.page-faq {
  --faq-soft: #C6D4E1;
  --faq-answer-size: 15.5px;
  --faq-read: 1040px;
  --faq-sticky-top: 96px;
  display: block;
  padding-block: clamp(8px, 1.6vw, 20px) clamp(48px, 7vw, 96px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(20px, 3.2vw, 44px);
  background:
    radial-gradient(115% 130% at 8% -12%, rgba(47, 224, 208, 0.16), transparent 58%),
    radial-gradient(100% 120% at 102% -4%, rgba(255, 122, 41, 0.13), transparent 60%),
    var(--ink-panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--orange) 58%, transparent 96%);
  opacity: 0.6;
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
  }
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-44);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-faq .faq-hero .lede {
  margin-top: 16px;
  max-width: 56ch;
  color: var(--faq-soft);
}

.page-faq .faq-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-12);
  letter-spacing: 0.05em;
  color: var(--muted);
}

.page-faq .faq-hero-figure {
  margin: 0;
  position: relative;
  aspect-ratio: 1000 / 560;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--ink-base);
  overflow: hidden;
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 分类入口 ---------- */

.page-faq .faq-cats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: var(--panel-gap);
}

@media (min-width: 640px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-faq .faq-cat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 16px 18px;
  background: var(--ink-panel);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--line);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition:
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  border-color: var(--cyan);
  border-left-color: var(--cyan);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.page-faq .faq-cat:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-cat-num {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-cat-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-17);
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-faq .faq-cat-desc {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 主体栅格 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--panel-gap);
  margin-top: var(--panel-gap);
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    max-width: var(--faq-read);
    margin-inline: auto;
    grid-template-columns: 224px minmax(0, 1fr);
    gap: clamp(24px, 3.4vw, 48px);
    align-items: start;
  }
}

.page-faq .faq-main {
  min-width: 0;
}

/* ---------- 侧栏 ---------- */

.page-faq .faq-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
}

@media (min-width: 960px) {
  .page-faq .faq-side {
    position: sticky;
    top: var(--faq-sticky-top);
    align-self: start;
  }
}

.page-faq .faq-side-label {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-side .chip-row {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-side .chip {
  flex: 0 0 auto;
  white-space: nowrap;
}

.page-faq .faq-side .chip[aria-pressed="true"] {
  border-color: var(--cyan);
  background: var(--cyan);
  color: var(--ink-deep);
}

@media (min-width: 960px) {
  .page-faq .faq-side .chip-row {
    flex-direction: column;
    align-items: stretch;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-side .chip {
    width: 100%;
    white-space: normal;
    justify-content: flex-start;
    text-align: left;
  }
}

.page-faq .faq-toc {
  display: none;
}

@media (min-width: 960px) {
  .page-faq .faq-toc {
    display: block;
    padding-top: 14px;
    border-top: 1px solid var(--line-soft);
  }

  .page-faq .faq-toc ol {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .page-faq .faq-toc a {
    display: block;
    padding: 7px 9px;
    font-size: var(--fs-14);
    color: var(--faq-soft);
    text-decoration: none;
    border-left: 2px solid transparent;
    border-radius: var(--radius-sm);
    transition:
      color var(--dur) var(--ease),
      background var(--dur) var(--ease),
      border-color var(--dur) var(--ease);
  }

  .page-faq .faq-toc a:hover,
  .page-faq .faq-toc a:focus-visible {
    color: var(--cyan);
    background: var(--tint-cyan);
    border-left-color: var(--cyan);
  }

  .page-faq .faq-toc a:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 2px;
  }
}

/* ---------- 分组画板 ---------- */

.page-faq .faq-group {
  background: var(--ink-panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
  padding: clamp(16px, 2.3vw, 26px);
  margin-bottom: var(--panel-gap);
  scroll-margin-top: 100px;
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-group-num {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-22);
  letter-spacing: 0.01em;
  color: var(--paper);
}

/* ---------- 问题条目 ---------- */

.page-faq .faq-list {
  display: block;
}

.page-faq .faq-item + .faq-item {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 2px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-17);
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-q:hover {
  color: var(--cyan-soft);
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.page-faq .faq-q-text {
  min-width: 0;
}

.page-faq .faq-marker {
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1;
  color: var(--cyan);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-marker::before {
  content: "+";
}

.page-faq .faq-item[open] > .faq-q {
  color: var(--cyan-soft);
}

.page-faq .faq-item[open] > .faq-q .faq-marker {
  border-color: var(--cyan);
  background: var(--tint-cyan);
}

.page-faq .faq-item[open] > .faq-q .faq-marker::before {
  content: "\2013";
}

/* ---------- 答案区 ---------- */

.page-faq .faq-a {
  margin: 0 0 18px 32px;
  padding: 14px 16px 16px;
  background: var(--tint-cyan);
  border-left: 1px solid var(--cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--faq-answer-size);
  line-height: 1.75;
  color: var(--faq-soft);
}

.page-faq .faq-a p {
  margin: 0;
}

.page-faq .faq-conclusion {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 224, 208, 0.4);
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

.page-faq .faq-a .note {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed rgba(56, 73, 92, 0.9);
}

.page-faq .faq-steps {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  position: relative;
  padding-left: 28px;
  counter-increment: faqstep;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-faq .faq-steps .badge {
  margin-right: 4px;
}

/* ---------- 章节配图 ---------- */

.page-faq .faq-figure {
  margin: 16px 0 4px;
  display: grid;
  gap: 8px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 800 / 560;
  object-fit: cover;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: var(--ink-base);
}

@media (min-width: 720px) {
  .page-faq .faq-figure {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    align-items: center;
    gap: 18px;
  }

  .page-faq .faq-figure .note {
    margin: 0;
  }
}

/* ---------- 收口 ---------- */

.page-faq .faq-cta {
  display: grid;
  gap: 18px;
  margin-top: var(--panel-gap);
  padding: clamp(20px, 3vw, 36px);
  background:
    linear-gradient(118deg, rgba(47, 224, 208, 0.12), transparent 48%),
    radial-gradient(90% 160% at 100% 100%, rgba(255, 122, 41, 0.1), transparent 64%),
    var(--ink-panel);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}

@media (min-width: 960px) {
  .page-faq .faq-cta {
    max-width: var(--faq-read);
    margin-inline: auto;
  }
}

@media (min-width: 800px) {
  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 28px;
  }
}

.page-faq .faq-cta-copy h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-30);
  line-height: 1.24;
  color: var(--paper);
}

.page-faq .faq-cta-copy p {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: var(--fs-17);
  line-height: 1.75;
  color: var(--faq-soft);
}

.page-faq .faq-cta .btn {
  justify-self: start;
  white-space: nowrap;
}

/* ---------- 窄屏收口 ---------- */

@media (max-width: 560px) {
  .page-faq .faq-a {
    margin-left: 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  }

  .page-faq .faq-q {
    gap: 10px;
  }

  .page-faq .faq-cta .btn {
    justify-self: stretch;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .faq-q,
  .page-faq .faq-marker {
    transition: none;
  }

  .page-faq .faq-cat:hover {
    transform: none;
  }
}