/* 喜鹊刷题 Pro — 正文样式域 .xp（顶栏/页脚不覆盖，与首页共用 style.css） */
html.xique-pro {
  --xp-max: 1240px;
  --xp-ink: #0b1220;
  --xp-text: #1e293b;
  --xp-muted: #64748b;
  --xp-line: #e2e8f0;
  --xp-bg: #f1f5f9;
  --xp-surface: #ffffff;
  --xp-accent: #2563eb;
  --xp-accent-hover: #1d4ed8;
  --xp-accent-soft: #eff6ff;
  --xp-radius: 14px;
  --xp-radius-lg: 22px;
  --xp-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
  --xp-shadow-lg: 0 20px 50px -24px rgba(15, 23, 42, 0.18);
}

html.xique-pro main.xp {
  font-family:
    "Inter",
    "Noto Sans SC",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  -webkit-font-smoothing: antialiased;
  color: var(--xp-text);
  background: var(--xp-bg);
  overflow-x: hidden;
}

.xp-container {
  width: 100%;
  max-width: var(--xp-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2rem);
}

/* Skip */
.xp-skip {
  position: absolute;
  left: 1rem;
  top: 0.75rem;
  z-index: 10000;
  padding: 0.45rem 0.9rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #fff;
  background: var(--xp-accent);
  border-radius: 8px;
  text-decoration: none;
  transform: translateY(-130%);
  transition: transform 0.2s;
}
.xp-skip:focus {
  transform: translateY(0);
  outline: 2px solid var(--xp-accent);
  outline-offset: 2px;
}

/* 页内目录（吸顶） */
.xp-toc {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--xp-line);
  box-shadow: 0 1px 0 rgba(15, 23, 42, 0.04);
  padding: 0.55rem 0;
}
.xp-toc-inner {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.4rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 2px;
}
.xp-toc-inner::-webkit-scrollbar {
  display: none;
}
.xp-toc-inner a {
  flex: 0 0 auto;
  padding: 0.45rem 0.95rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--xp-muted);
  text-decoration: none;
  border-radius: 999px;
  border: 1px solid transparent;
  transition:
    color 0.2s,
    background 0.2s,
    border-color 0.2s;
}
.xp-toc-inner a:hover {
  color: var(--xp-accent-hover);
  background: var(--xp-accent-soft);
  border-color: rgba(37, 99, 235, 0.12);
}
.xp-toc-inner a:focus-visible {
  outline: 2px solid var(--xp-accent);
  outline-offset: 2px;
}

/* Hero */
.xp-hero {
  position: relative;
  padding: clamp(3rem, 7vw, 4.5rem) 0 clamp(3rem, 7vw, 5rem);
  background:
    radial-gradient(
      ellipse 90% 60% at 70% -10%,
      rgba(37, 99, 235, 0.12) 0%,
      transparent 50%
    ),
    linear-gradient(180deg, #fff 0%, var(--xp-bg) 100%);
}
.xp-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}
@media (max-width: 991px) {
  .xp-hero-grid {
    grid-template-columns: 1fr;
  }
}
.xp-hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4.5vw, 2.85rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--xp-ink);
}
.xp-hero-lead {
  margin: 0 0 1.25rem;
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--xp-muted);
  max-width: 36em;
}
.xp-hero-sub {
  margin: 0 0 1.75rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--xp-text);
  max-width: 38em;
}
.xp-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.xp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 10px;
  text-decoration: none;
  border: 1px solid transparent;
  transition:
    background 0.2s,
    color 0.2s,
    border-color 0.2s,
    box-shadow 0.2s;
}
.xp-btn--primary {
  background: var(--xp-accent);
  color: #fff;
  border-color: var(--xp-accent);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.35);
}
.xp-btn--primary:hover {
  background: var(--xp-accent-hover);
  color: #fff;
  text-decoration: none;
}
.xp-btn--secondary {
  background: var(--xp-surface);
  color: var(--xp-ink);
  border-color: var(--xp-line);
}
.xp-btn--secondary:hover {
  border-color: #cbd5e1;
  background: #f8fafc;
  text-decoration: none;
}
.xp-hero-note {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--xp-muted);
}

.xp-hero-visual {
  position: relative;
}
.xp-mock {
  position: relative;
  /* border-radius: var(--xp-radius-lg); */
  /* background: linear-gradient(145deg, #e8edf4 0%, #f8fafc 50%, #e2e8f0 100%); */
  /* border: 1px solid var(--xp-line); */
  /* box-shadow: var(--xp-shadow-lg); */
  overflow: hidden;
}
/* .xp-mock::before {
  content: "";
  display: block;
  padding-bottom: 52%;
} */
.xp-mock-inner {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  /* padding: 1.5rem; */
  text-align: center;
}
.xp-mock .fa {
  font-size: 2.25rem;
  color: #94a3b8;
}
.xp-mock-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: #64748b;
}
.xp-mock-hint {
  font-size: 0.75rem;
  color: #94a3b8;
  max-width: 18rem;
  line-height: 1.45;
}

/* Facts strip */
.xp-strip {
  padding: 1.75rem 0;
  background: var(--xp-surface);
  border-bottom: 1px solid var(--xp-line);
}
.xp-strip-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 2.5rem;
  text-align: center;
}
.xp-strip-item {
  font-size: 0.875rem;
  color: var(--xp-muted);
}
.xp-strip-item strong {
  display: block;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--xp-ink);
  margin-bottom: 0.2rem;
}

/* Section generic */
.xp-section {
  padding: clamp(3.25rem, 7vw, 5rem) 0;
}
.xp-section--alt {
  background: var(--xp-surface);
  border-top: 1px solid var(--xp-line);
  border-bottom: 1px solid var(--xp-line);
}
.xp-section-head {
  /* max-width: 42rem; */
  margin: 0 auto 2.5rem;
  text-align: center;
}
.xp-section-head .xp-lead {
  /* max-width: 38rem; */
  margin-left: auto;
  margin-right: auto;
}
.xp-eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--xp-accent-hover);
}
.xp-h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--xp-ink);
  line-height: 1.25;
}
.xp-lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--xp-muted);
}

/* Split */
.xp-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 1000px;
  margin: 0 auto;
}
@media (max-width: 768px) {
  .xp-split {
    grid-template-columns: 1fr;
  }
}
.xp-split-card {
  padding: 2rem 1.75rem;
  border-radius: var(--xp-radius-lg);
  background: var(--xp-surface);
  border: 1px solid var(--xp-line);
  box-shadow: var(--xp-shadow);
}
.xp-split-card--a {
  border-top: 3px solid var(--xp-accent);
}
.xp-split-card--b {
  border-top: 3px solid #475569;
}
.xp-split-kicker {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--xp-accent-hover);
}
.xp-split-card--b .xp-split-kicker {
  color: #475569;
}
.xp-split-card h3 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--xp-ink);
}
.xp-split-card > p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--xp-text);
}
.xp-split-card ul {
  margin: 0;
  padding-left: 1.2em;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--xp-muted);
}
.xp-split-card li + li {
  margin-top: 0.4em;
}

/* Pillars */
.xp-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 991px) {
  .xp-pillars {
    grid-template-columns: 1fr;
  }
}
.xp-pillar {
  padding: 1.75rem;
  border-radius: var(--xp-radius);
  background: var(--xp-surface);
  border: 1px solid var(--xp-line);
  transition:
    box-shadow 0.2s,
    border-color 0.2s;
}
.xp-pillar:hover {
  box-shadow: var(--xp-shadow);
  border-color: #c7d2fe;
}
.xp-pillar-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--xp-accent-soft);
  color: var(--xp-accent-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}
.xp-pillar h3 {
  margin: 0 0 0.5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--xp-ink);
}
.xp-pillar p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.68;
  color: var(--xp-muted);
}

/* Modes */
.xp-modes-layout {
  display: flex;
  flex-direction: column;
  gap: clamp(2rem, 4vw, 2.75rem);
  margin-top: 0.5rem;
}
.xp-modes-group {
  display: grid;
  grid-template-columns: minmax(160px, 220px) 1fr;
  gap: clamp(1.25rem, 3vw, 2rem);
  align-items: start;
  padding: clamp(1.35rem, 3vw, 1.75rem);
  border-radius: var(--xp-radius-lg);
  background: var(--xp-surface);
  border: 1px solid var(--xp-line);
  box-shadow: var(--xp-shadow);
}
@media (max-width: 767px) {
  .xp-modes-group {
    grid-template-columns: 1fr;
  }
}
.xp-modes-group--accent {
  background: linear-gradient(
    135deg,
    var(--xp-surface) 0%,
    var(--xp-accent-soft) 55%,
    var(--xp-surface) 100%
  );
  border-color: rgba(37, 99, 235, 0.18);
}
.xp-modes-group-head {
  position: relative;
  padding-left: 0.25rem;
}
.xp-modes-group-idx {
  display: block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--xp-accent);
  margin-bottom: 0.35rem;
}
.xp-modes-group-title {
  margin: 0 0 0.4rem;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--xp-ink);
  line-height: 1.25;
}
.xp-modes-group-desc {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--xp-muted);
}
.xp-modes-grid {
  display: grid;
  gap: 0.85rem;
}
.xp-modes-grid--4 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (min-width: 900px) {
  .xp-modes-grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
.xp-modes-grid--3 {
  grid-template-columns: 1fr;
}
@media (min-width: 640px) {
  .xp-modes-grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.xp-modes-group--accent .xp-modes-grid--3 {
  max-width: min(100%, 56rem);
  margin-inline: auto;
}
.xp-mode-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 100%;
  padding: 1rem 1rem 1.1rem;
  border-radius: calc(var(--xp-radius) - 2px);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--xp-line);
  transition:
    border-color 0.2s,
    box-shadow 0.2s,
    transform 0.2s;
}
.xp-modes-group--accent .xp-mode-card {
  background: var(--xp-surface);
}
.xp-mode-card:hover {
  border-color: rgba(37, 99, 235, 0.35);
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.08);
  transform: translateY(-2px);
}
.xp-mode-card--highlight {
  border-color: rgba(37, 99, 235, 0.45);
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.12);
}
.xp-mode-card__icon {
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-size: 1rem;
  color: var(--xp-accent);
  background: var(--xp-accent-soft);
}
.xp-mode-card--highlight .xp-mode-card__icon {
  background: var(--xp-accent);
  color: #fff;
}
.xp-mode-card__title {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--xp-ink);
  line-height: 1.3;
}
.xp-mode-card__text {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.58;
  color: var(--xp-muted);
}
@media (prefers-reduced-motion: reduce) {
  .xp-mode-card:hover {
    transform: none;
  }
}

/* Feature rows */
.xp-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 4vw, 3rem);
  align-items: center;
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  border-bottom: 1px solid var(--xp-line);
}
.xp-feature:last-child {
  border-bottom: none;
}
.xp-feature--reverse .xp-feature-text {
  order: 2;
}
.xp-feature--reverse .xp-feature-media {
  order: 1;
}
@media (max-width: 991px) {
  .xp-feature {
    grid-template-columns: 1fr;
  }
  .xp-feature--reverse .xp-feature-text,
  .xp-feature--reverse .xp-feature-media {
    order: unset;
  }
}
.xp-feature-num {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--xp-accent-hover);
}
.xp-feature-text h3 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.2rem, 2.2vw, 1.4rem);
  font-weight: 700;
  color: var(--xp-ink);
}
.xp-feature-text > p {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--xp-muted);
}
.xp-feature-text ul {
  margin: 0;
  padding-left: 1.15em;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--xp-muted);
}
.xp-feature-media .xp-mock::before {
  padding-bottom: 62%;
}

.xp-showcase {
  padding: clamp(2.5rem, 5vw, 3.5rem) 0;
  background: linear-gradient(180deg, var(--xp-bg) 0%, var(--xp-surface) 100%);
  border-top: 1px solid var(--xp-line);
}
.xp-showcase .xp-section-head {
  margin-bottom: 1.75rem;
}
.xp-showcase .xp-mock::before {
  padding-bottom: 46%;
}

/* Steps */
.xp-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  counter-reset: xpstep;
}
@media (max-width: 991px) {
  .xp-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 576px) {
  .xp-steps {
    grid-template-columns: 1fr;
  }
}
.xp-step {
  padding: 1.5rem 1.25rem;
  border-radius: var(--xp-radius);
  background: var(--xp-surface);
  border: 1px solid var(--xp-line);
  position: relative;
  counter-increment: xpstep;
}
.xp-step::before {
  content: counter(xpstep, decimal-leading-zero);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--xp-accent-hover);
  display: block;
  margin-bottom: 0.5rem;
}
.xp-step h4 {
  margin: 0 0 0.35rem;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--xp-ink);
}
.xp-step p {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--xp-muted);
}
.xp-person-note {
  margin-top: 2rem;
  padding: 1.25rem 1.5rem;
  border-radius: var(--xp-radius);
  background: var(--xp-accent-soft);
  border: 1px solid rgba(37, 99, 235, 0.2);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--xp-text);
}
.xp-person-note a {
  color: var(--xp-accent-hover);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(37, 99, 235, 0.35);
}

/* FAQ */
.xp-faq {
  max-width: 40rem;
  margin: 0 auto;
}
.xp-faq details {
  border-bottom: 1px solid var(--xp-line);
}
.xp-faq summary {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 2rem 1.1rem 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--xp-ink);
  position: relative;
}
.xp-faq summary::-webkit-details-marker {
  display: none;
}
.xp-faq summary::after {
  content: "\f107";
  font-family: FontAwesome;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  color: #cbd5e1;
}
.xp-faq details[open] summary::after {
  color: var(--xp-accent);
}
.xp-faq details p {
  margin: 0;
  padding-bottom: 1.1rem;
  font-size: 0.9375rem;
  line-height: 1.72;
  color: var(--xp-muted);
}

/* CTA */
.xp-cta {
  padding: clamp(3rem, 6vw, 4.75rem) 0;
  background: linear-gradient(165deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  color: #fff;
  text-align: center;
}
.xp-cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 2.5rem);
  align-items: center;
}
@media (min-width: 900px) {
  .xp-cta-grid {
    grid-template-columns: minmax(0, 1fr) minmax(220px, 300px);
    gap: clamp(2rem, 4vw, 3rem);
    text-align: left;
    align-items: center;
  }
  .xp-cta-main {
    text-align: left;
  }
  .xp-cta-main h2 {
    margin-left: 0;
    margin-right: 0;
  }
  .xp-cta-main > p:first-of-type {
    margin-left: 0;
    margin-right: 0;
  }
  .xp-cta-actions {
    justify-content: flex-start;
  }
}
.xp-cta-main h2 {
  margin: 0 auto 0.65rem;
  max-width: 28rem;
  font-size: clamp(1.35rem, 2.8vw, 1.65rem);
  font-weight: 700;
  line-height: 1.35;
}
@media (min-width: 900px) {
  .xp-cta-main h2 {
    max-width: none;
  }
}
.xp-cta-main > p:first-of-type {
  margin: 0 auto 1.35rem;
  max-width: 36rem;
  font-size: 1rem;
  line-height: 1.68;
  color: rgba(255, 255, 255, 0.72);
}
.xp-cta-actions {
  display: flex;
  flex-wrap: wrap;
  /* justify-content: center; */
  gap: 0.65rem;
  margin-bottom: 1rem;
}
.xp-cta-foot {
  margin: 0;
  font-size: 0.875rem;
}
.xp-cta-link {
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition:
    color 0.2s,
    border-color 0.2s;
}
.xp-cta-link:hover {
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, 0.45);
}
.xp-btn--light {
  background: #fff;
  color: #0f172a;
  border-color: #fff;
}
.xp-btn--light:hover {
  background: #f1f5f9;
  color: #0f172a;
  text-decoration: none;
}
.xp-btn--outline-light {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
}
.xp-btn--outline-light:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  text-decoration: none;
}
.xp-btn--link-light {
  background: transparent;
  color: rgba(255, 255, 255, 0.55);
  border-color: transparent;
}
.xp-btn--link-light:hover {
  color: #fff;
  text-decoration: none;
}

.xp-cta-side .xp-qr-card {
  margin-top: 0;
}
.xp-qr-card {
  max-width: 280px;
  margin-left: auto;
  margin-right: auto;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.xp-qr-card > p:first-child {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.75);
}
.xp-qr-card img {
  display: block;
  margin: 0 auto;
  border-radius: 8px;
  background: #fff;
  padding: 8px;
}

main.xp section[id] {
  scroll-margin-top: 4.5rem;
}

@media (max-width: 576px) {
  .xp-hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  .xp-hero-cta .xp-btn {
    width: 100%;
  }
}