/* demo-center 公共样式：先看四个可直接运行的 Demo，再决定要不要进入真实流程。 */
html body[data-qidian-page="demo-center"] {
  --demo-paper: #f5ede0;
  --demo-paper-soft: #ebdfcf;
  --demo-warm: #e3d3bb;
  --demo-ink: #17130d;
  --demo-ink-soft: #58483a;
  --demo-dark: #11100c;
  --demo-dark-soft: #191713;
  --demo-accent: #6f5940;
  --demo-accent-soft: #bea27a;
  --demo-line: rgba(23, 19, 13, .14);
  --demo-line-strong: rgba(23, 19, 13, .24);
  --demo-line-dark: rgba(245, 237, 224, .15);
  --demo-shadow: 0 26px 60px rgba(17, 13, 8, .12);
  background: var(--demo-paper);
  color: var(--demo-ink);
  overflow-x: clip;
}

html body[data-qidian-page="demo-center"] *,
html body[data-qidian-page="demo-center"] *::before,
html body[data-qidian-page="demo-center"] *::after {
  box-sizing: border-box;
}

html body[data-qidian-page="demo-center"] a {
  color: inherit;
  text-decoration: none;
}

html body[data-qidian-page="demo-center"] img {
  display: block;
  max-width: 100%;
  height: auto;
}

html body[data-qidian-page="demo-center"] button,
html body[data-qidian-page="demo-center"] input,
html body[data-qidian-page="demo-center"] textarea,
html body[data-qidian-page="demo-center"] select {
  font: inherit;
}

html body[data-qidian-page="demo-center"] main {
  overflow-x: clip;
}

html body[data-qidian-page="demo-center"] .shell {
  width: min(1240px, calc(100vw - 32px));
  margin: 0 auto;
}

html body[data-qidian-page="demo-center"] .eyebrow {
  color: var(--demo-accent);
  font: 700 12px/1.45 var(--qds-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  letter-spacing: .18em;
  text-transform: uppercase;
}

html body[data-qidian-page="demo-center"] .btn {
  min-height: 48px;
  border-radius: 0 !important;
  box-shadow: none !important;
  border-width: 1px;
  border-style: solid;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  font-weight: 700;
  letter-spacing: .01em;
  transition: transform .16s ease, border-color .16s ease, color .16s ease, background-color .16s ease;
}

html body[data-qidian-page="demo-center"] .btn:hover,
html body[data-qidian-page="demo-center"] .btn:focus-visible {
  transform: translateY(-1px);
}

html body[data-qidian-page="demo-center"] .btn.gold {
  background: var(--demo-accent-soft) !important;
  border-color: var(--demo-accent-soft) !important;
  color: #17130d !important;
}

html body[data-qidian-page="demo-center"] .btn.ghost {
  background: transparent !important;
  border-color: var(--demo-line-strong) !important;
  color: var(--demo-ink) !important;
}

html body[data-qidian-page="demo-center"] .demo-section--dark .eyebrow,
html body[data-qidian-page="demo-center"] .demo-chapter--flip .eyebrow {
  color: var(--demo-accent-soft) !important;
}

html body[data-qidian-page="demo-center"] .demo-section--dark .btn.ghost {
  border-color: var(--demo-line-dark) !important;
  color: #f5efe4 !important;
}

html body[data-qidian-page="demo-center"] .demo-section--dark .btn.gold {
  background: var(--demo-accent-soft) !important;
  border-color: var(--demo-accent-soft) !important;
  color: #17130d !important;
}

html body[data-qidian-page="demo-center"] .demo-section--light .btn.ghost,
html body[data-qidian-page="demo-center"] .demo-section--warm .btn.ghost {
  color: var(--demo-ink) !important;
}

html body[data-qidian-page="demo-center"] main .q-rise,
html body[data-qidian-page="demo-center"] .qfootmap {
  opacity: 1 !important;
  transform: none !important;
  animation: none !important;
  transition: none !important;
}

html body[data-qidian-page="demo-center"] .site-head {
  position: sticky;
  top: 0;
  z-index: 40;
}

html body[data-qidian-page="demo-center"] .demo-center-main {
  overflow-x: clip;
}

html body[data-qidian-page="demo-center"] .demo-hero {
  padding: clamp(6.5rem, 12vw, 10rem) 0 clamp(4rem, 8vw, 6rem);
  background: var(--demo-paper);
  border-bottom: 1px solid var(--demo-line);
}

html body[data-qidian-page="demo-center"] .demo-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(0, .72fr);
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: end;
}

html body[data-qidian-page="demo-center"] .demo-hero__copy {
  min-width: 0;
}

html body[data-qidian-page="demo-center"] .demo-hero h1,
html body[data-qidian-page="demo-center"] .demo-principles h2,
html body[data-qidian-page="demo-center"] .demo-scope h2,
html body[data-qidian-page="demo-center"] .demo-workflow h2,
html body[data-qidian-page="demo-center"] .demo-cta h2 {
  margin: .55rem 0 1.2rem;
  font-family: var(--qds-serif, "Songti SC", "Noto Serif SC", STSong, serif);
  letter-spacing: -.06em;
  line-height: .94;
  font-weight: 600;
}

html body[data-qidian-page="demo-center"] .demo-hero h1 {
  display: grid;
  gap: .08em;
  width: fit-content;
  max-width: 100%;
  color: var(--demo-ink) !important;
  font-size: clamp(4rem, 7vw, 6.25rem) !important;
}

html body[data-qidian-page="demo-center"] .demo-hero h1 span {
  display: block;
  white-space: nowrap;
  word-break: keep-all;
  overflow-wrap: normal;
}

html body[data-qidian-page="demo-center"] .demo-hero__lead {
  margin: 0;
  max-width: 50ch;
  color: var(--demo-ink-soft) !important;
  font-size: clamp(1.03rem, 1.5vw, 1.18rem);
  line-height: 1.9;
}

html body[data-qidian-page="demo-center"] .demo-hero__status {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 1.5rem;
  padding: 0 14px;
  border: 1px solid var(--demo-line-strong);
  color: var(--demo-accent);
  letter-spacing: .1em;
  text-transform: uppercase;
  font-size: 12px;
}

html body[data-qidian-page="demo-center"] .demo-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 1.9rem;
}

html body[data-qidian-page="demo-center"] .demo-hero__figure {
  margin: 0;
  display: grid;
  gap: .8rem;
  align-self: start;
}

html body[data-qidian-page="demo-center"] .demo-hero__figure img {
  width: 100%;
  border: 1px solid var(--demo-line);
  background: var(--demo-paper-soft);
  box-shadow: var(--demo-shadow);
}

html body[data-qidian-page="demo-center"] .demo-hero__figure figcaption {
  color: var(--demo-ink-soft);
  font-size: .92rem;
  line-height: 1.6;
}

html body[data-qidian-page="demo-center"] .demo-jump {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--demo-line);
  border-bottom: 1px solid var(--demo-line);
  background: var(--demo-paper);
}

html body[data-qidian-page="demo-center"] .demo-jump a {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  min-height: 7.1rem;
  padding: 1rem 0;
  border-right: 1px solid var(--demo-line);
}

html body[data-qidian-page="demo-center"] .demo-jump a:last-child {
  border-right: 0;
}

html body[data-qidian-page="demo-center"] .demo-jump a:hover,
html body[data-qidian-page="demo-center"] .demo-jump a:focus-visible {
  background: rgba(183, 140, 67, .06);
}

html body[data-qidian-page="demo-center"] .demo-jump span {
  color: var(--demo-accent);
  font: 600 .8rem/1 var(--qds-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  letter-spacing: .16em;
}

html body[data-qidian-page="demo-center"] .demo-jump b {
  display: block;
  color: var(--demo-ink) !important;
  font-size: 1.08rem;
}

html body[data-qidian-page="demo-center"] .demo-jump small {
  display: block;
  margin-top: .35rem;
  color: var(--demo-ink-soft) !important;
  line-height: 1.55;
}

html body[data-qidian-page="demo-center"] .demo-jump em {
  color: var(--demo-accent);
  font-style: normal;
  white-space: nowrap;
}

html body[data-qidian-page="demo-center"] .demo-jump i {
  font-style: normal;
  transition: transform .18s cubic-bezier(.16, 1, .3, 1);
}

html body[data-qidian-page="demo-center"] .demo-jump a:hover i,
html body[data-qidian-page="demo-center"] .demo-jump a:focus-visible i {
  transform: translateX(.3rem);
}

html body[data-qidian-page="demo-center"] .demo-principles {
  padding: clamp(5.5rem, 10vw, 9rem) 0;
  background: var(--demo-dark);
  color: #f5efe4;
  border-bottom: 1px solid var(--demo-line-dark);
}

html body[data-qidian-page="demo-center"] .demo-principles__grid {
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  gap: clamp(2.5rem, 7vw, 5rem);
  align-items: start;
}

html body[data-qidian-page="demo-center"] .demo-principles h2 {
  margin-top: .6rem;
  max-width: 10ch;
  color: #f5efe4 !important;
  font-size: clamp(2.8rem, 5.4vw, 5.6rem);
}

html body[data-qidian-page="demo-center"] .demo-principles__line {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
  padding: 1.45rem 0;
  border-top: 1px solid rgba(245, 237, 224, .12);
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  color: inherit !important;
}

html body[data-qidian-page="demo-center"] .demo-principles__line:last-of-type {
  border-bottom: 1px solid rgba(245, 237, 224, .12);
}

html body[data-qidian-page="demo-center"] .demo-principles__line span {
  color: var(--demo-accent-soft);
  font: 600 .8rem/1 var(--qds-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  letter-spacing: .16em;
  padding-top: .2rem;
}

html body[data-qidian-page="demo-center"] .demo-principles__line b {
  font-size: clamp(1.5rem, 2.8vw, 2.6rem);
  line-height: 1.18;
  letter-spacing: -.03em;
}

html body[data-qidian-page="demo-center"] .demo-principles__conclusion {
  margin: 1.7rem 0 0;
  font-family: var(--qds-serif, "Songti SC", "Noto Serif SC", STSong, serif);
  font-size: clamp(2.1rem, 5vw, 4.8rem);
  line-height: 1.05;
  letter-spacing: -.05em;
  color: #f5efe4;
}

html body[data-qidian-page="demo-center"] .demo-directory {
  background: var(--demo-paper);
}

html body[data-qidian-page="demo-center"] .demo-chapter {
  padding: clamp(4.8rem, 9vw, 8rem) 0;
  border-top: 1px solid var(--demo-line);
}

html body[data-qidian-page="demo-center"] .demo-chapter--flip {
  border-top-color: var(--demo-line-dark);
}

html body[data-qidian-page="demo-center"] .demo-section--warm {
  background: var(--demo-paper-soft);
}

html body[data-qidian-page="demo-center"] .demo-section--light {
  background: var(--demo-paper);
}

html body[data-qidian-page="demo-center"] .demo-section--dark {
  background: var(--demo-dark);
  color: #f5efe4;
}

html body[data-qidian-page="demo-center"] .demo-chapter.demo-section--light {
  background: var(--demo-paper) !important;
  color: var(--demo-ink) !important;
}

html body[data-qidian-page="demo-center"] .demo-chapter.demo-section--dark {
  background: var(--demo-dark-soft) !important;
  color: #f5efe4 !important;
}

html body[data-qidian-page="demo-center"] .demo-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, .96fr);
  gap: clamp(2rem, 6vw, 4.5rem);
  align-items: center;
}

html body[data-qidian-page="demo-center"] .demo-chapter--flip .demo-chapter__copy {
  order: 1;
}

html body[data-qidian-page="demo-center"] .demo-chapter--flip .demo-chapter__media {
  order: 2;
}

html body[data-qidian-page="demo-center"] .demo-chapter__media {
  margin: 0;
}

html body[data-qidian-page="demo-center"] .demo-chapter__media img {
  width: 100%;
  border: 1px solid var(--demo-line);
  background: var(--demo-paper-soft);
  box-shadow: var(--demo-shadow);
}

html body[data-qidian-page="demo-center"] .demo-chapter--flip .demo-chapter__media img {
  border-color: var(--demo-line-dark);
  background: #15130f;
}

html body[data-qidian-page="demo-center"] .demo-chapter__copy {
  min-width: 0;
}

html body[data-qidian-page="demo-center"] .demo-chapter__eyebrow {
  margin-bottom: .35rem;
}

html body[data-qidian-page="demo-center"] .demo-chapter__copy h2 {
  margin: .4rem 0 1rem;
  color: inherit;
  font-family: var(--qds-serif, "Songti SC", "Noto Serif SC", STSong, serif);
  font-size: clamp(2.4rem, 4.8vw, 5rem);
  line-height: 1.02;
  letter-spacing: -.055em;
}

html body[data-qidian-page="demo-center"] .demo-chapter__lead {
  margin: 0 0 1rem;
  max-width: 44ch;
  color: inherit;
  font-size: clamp(1.02rem, 1.45vw, 1.16rem);
  line-height: 1.88;
}

html body[data-qidian-page="demo-center"] .demo-chapter__copy p {
  margin: 0 0 .95rem;
  color: inherit;
  line-height: 1.85;
}

html body[data-qidian-page="demo-center"] .demo-facts {
  margin: 1.6rem 0 2rem;
  border-top: 1px solid currentColor;
}

html body[data-qidian-page="demo-center"] .demo-facts div {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid currentColor;
}

html body[data-qidian-page="demo-center"] .demo-facts dt {
  color: var(--demo-accent);
  font: 700 .78rem/1.5 var(--qds-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  letter-spacing: .14em;
  text-transform: uppercase;
}

html body[data-qidian-page="demo-center"] .demo-facts dd {
  margin: 0;
  color: inherit;
  line-height: 1.72;
}

html body[data-qidian-page="demo-center"] .demo-chapter--flip .demo-facts dt {
  color: var(--demo-accent-soft);
}

html body[data-qidian-page="demo-center"] .demo-chapter__actions {
  margin-top: 1.5rem;
}

html body[data-qidian-page="demo-center"] .demo-scope {
  padding: clamp(5rem, 9vw, 8.5rem) 0;
  border-top: 1px solid var(--demo-line);
  border-bottom: 1px solid var(--demo-line);
}

html body[data-qidian-page="demo-center"] .demo-scope__grid {
  display: grid;
  grid-template-columns: minmax(0, .96fr) minmax(0, 1.04fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}

html body[data-qidian-page="demo-center"] .demo-scope h2 {
  margin-top: .5rem;
  color: var(--demo-ink) !important;
  font-size: clamp(2.7rem, 5vw, 5.3rem);
}

html body[data-qidian-page="demo-center"] .demo-scope__text {
  border-top: 1px solid var(--demo-line);
}

html body[data-qidian-page="demo-center"] .demo-scope__item {
  padding: 1.65rem 0;
  border-bottom: 1px solid var(--demo-line);
}

html body[data-qidian-page="demo-center"] .demo-scope__item b {
  display: block;
  margin-bottom: .55rem;
  color: var(--demo-ink) !important;
  font-size: 1.06rem;
}

html body[data-qidian-page="demo-center"] .demo-scope__item p {
  margin: 0;
  color: var(--demo-ink-soft) !important;
  line-height: 1.82;
}

html body[data-qidian-page="demo-center"] .demo-scope__actions {
  margin-top: 1.7rem;
}

html body[data-qidian-page="demo-center"] .demo-workflow {
  padding: clamp(5rem, 9vw, 8.5rem) 0;
  background: var(--demo-dark);
  color: #f5efe4;
}

html body[data-qidian-page="demo-center"] .demo-workflow__head h2 {
  margin-top: .5rem;
  max-width: 9ch;
  color: #f5efe4 !important;
  font-size: clamp(2.7rem, 5vw, 5.3rem);
}

html body[data-qidian-page="demo-center"] .demo-workflow__rows {
  margin-top: 1.75rem;
  border-top: 1px solid var(--demo-line-dark);
}

html body[data-qidian-page="demo-center"] .demo-workflow__row {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1.1fr) minmax(0, 1.9fr);
  gap: 1.15rem;
  align-items: start;
  padding: 1.45rem 0;
  border-bottom: 1px solid var(--demo-line-dark);
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  color: inherit !important;
}

html body[data-qidian-page="demo-center"] .demo-workflow__row span {
  color: var(--demo-accent-soft);
  font: 600 .8rem/1 var(--qds-mono, ui-monospace, SFMono-Regular, Menlo, monospace);
  letter-spacing: .16em;
}

html body[data-qidian-page="demo-center"] .demo-workflow__row b {
  color: #f5efe4 !important;
  font-size: 1.08rem;
}

html body[data-qidian-page="demo-center"] .demo-workflow__row p {
  margin: 0;
  color: #d7cdbd !important;
  line-height: 1.82;
}

html body[data-qidian-page="demo-center"] .demo-cta {
  padding: clamp(5rem, 9vw, 8.5rem) 0;
  background: var(--demo-paper-soft);
}

html body[data-qidian-page="demo-center"] .demo-cta__grid {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
}

html body[data-qidian-page="demo-center"] .demo-cta h2 {
  margin-top: .5rem;
  color: var(--demo-ink) !important;
  font-size: clamp(2.8rem, 5.3vw, 5.4rem);
}

html body[data-qidian-page="demo-center"] .demo-cta__body p {
  margin: 0;
  color: var(--demo-ink-soft) !important;
  line-height: 1.88;
  max-width: 40rem;
}

html body[data-qidian-page="demo-center"] .demo-cta__actions {
  margin-top: 1.7rem;
}

html body[data-qidian-page="demo-center"] .demo-cta .btn.ghost {
  border-color: var(--demo-line-strong) !important;
}

html body[data-qidian-page="demo-center"] .demo-cta .btn.gold {
  background: var(--demo-accent-soft) !important;
  border-color: var(--demo-accent-soft) !important;
}

html body[data-qidian-page="demo-center"] :focus-visible {
  outline: 2px solid var(--demo-accent);
  outline-offset: 4px;
}

@media (max-width: 980px) {
  html body[data-qidian-page="demo-center"] .nav-links.qnav:not(.open) {
    display: none !important;
  }

  html body[data-qidian-page="demo-center"] .nav-links.qnav.open {
    display: flex !important;
  }

  html body[data-qidian-page="demo-center"] .demo-hero__grid,
  html body[data-qidian-page="demo-center"] .demo-principles__grid,
  html body[data-qidian-page="demo-center"] .demo-scope__grid,
  html body[data-qidian-page="demo-center"] .demo-cta__grid {
    grid-template-columns: 1fr;
  }

  html body[data-qidian-page="demo-center"] .demo-chapter__grid {
    grid-template-columns: 1fr;
  }

  html body[data-qidian-page="demo-center"] .demo-chapter--flip .demo-chapter__copy,
  html body[data-qidian-page="demo-center"] .demo-chapter--flip .demo-chapter__media {
    order: initial;
  }

  html body[data-qidian-page="demo-center"] .demo-jump {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  html body[data-qidian-page="demo-center"] .demo-workflow__row {
    grid-template-columns: 4rem minmax(0, 1fr);
  }

  html body[data-qidian-page="demo-center"] .demo-workflow__row p {
    grid-column: 2;
  }
}

@media (max-width: 640px) {
  html body[data-qidian-page="demo-center"] .shell {
    width: min(1240px, calc(100vw - 24px));
  }

  html body[data-qidian-page="demo-center"] .demo-hero {
    padding-top: 5.8rem;
  }

  html body[data-qidian-page="demo-center"] .demo-hero h1 {
    width: 100%;
    font-size: clamp(3.05rem, 13vw, 4.6rem) !important;
  }

  html body[data-qidian-page="demo-center"] .demo-principles h2,
  html body[data-qidian-page="demo-center"] .demo-scope h2,
  html body[data-qidian-page="demo-center"] .demo-workflow h2,
  html body[data-qidian-page="demo-center"] .demo-cta h2 {
    font-size: clamp(2.3rem, 11vw, 3.8rem);
  }

  html body[data-qidian-page="demo-center"] .demo-jump {
    grid-template-columns: 1fr;
  }

  html body[data-qidian-page="demo-center"] .demo-jump a {
    grid-template-columns: 3rem minmax(0, 1fr) auto;
  }

  html body[data-qidian-page="demo-center"] .demo-principles__line,
  html body[data-qidian-page="demo-center"] .demo-facts div,
  html body[data-qidian-page="demo-center"] .demo-workflow__row {
    grid-template-columns: 1fr;
  }

  html body[data-qidian-page="demo-center"] .demo-facts dd,
  html body[data-qidian-page="demo-center"] .demo-workflow__row p {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html body[data-qidian-page="demo-center"] {
    scroll-behavior: auto;
  }

  html body[data-qidian-page="demo-center"] .btn,
  html body[data-qidian-page="demo-center"] .demo-jump i {
    transition: none;
  }
}