.page-faq {
  --faq-gap: clamp(26px, 4vw, 48px);
  --faq-card-bg: linear-gradient(158deg, rgba(23, 59, 48, 0.82), rgba(14, 42, 34, 0.94));
  --faq-inset: rgba(7, 19, 15, 0.48);
  padding-bottom: clamp(48px, 8vw, 88px);
}

.page-faq .faq-hero {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(22px, 4vw, 42px);
  padding-bottom: clamp(30px, 5vw, 60px);
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -12%;
  right: -14%;
  width: min(760px, 96vw);
  height: min(540px, 68vw);
  background:
    radial-gradient(circle at 28% 30%, rgba(200, 255, 61, 0.16), transparent 62%),
    radial-gradient(circle at 72% 68%, rgba(139, 124, 255, 0.14), transparent 60%);
  clip-path: polygon(20% 0, 100% 0, 100% 80%, 0 100%);
  pointer-events: none;
  z-index: -1;
}

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

.page-faq .faq-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  line-height: 1.4;
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 56px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--fog);
  max-width: 20ch;
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 66ch;
  color: var(--mist);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-panel);
  transform: rotate(-1.1deg);
}

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

.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 3.6vw, 40px);
  padding-top: clamp(6px, 1.6vw, 16px);
}

/* 目录 */
.page-faq .faq-toc {
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--faq-inset);
}

.page-faq .faq-toc__label {
  margin: 0 0 10px;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.55;
  text-decoration: none;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-toc__list a:hover,
.page-faq .faq-toc__list a:focus-visible {
  color: var(--fog);
  background: rgba(23, 59, 48, 0.72);
  border-left-color: var(--signal);
}

.page-faq .faq-toc__num {
  flex: none;
  color: var(--grid);
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-toc__note {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  color: var(--grid);
  font-size: 12.5px;
  line-height: 1.7;
}

/* 章节卡片 */
.page-faq .faq-content {
  min-width: 0;
}

.page-faq .faq-topic {
  position: relative;
  padding: clamp(18px, 3vw, 30px);
  margin-bottom: clamp(20px, 3.2vw, 32px);
  background: var(--faq-card-bg);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
  scroll-margin-top: 92px;
}

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

.page-faq .faq-topic__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.page-faq .faq-topic__index {
  flex: none;
  font-family: var(--font-serif);
  font-size: clamp(32px, 4.6vw, 44px);
  line-height: 0.95;
  color: var(--grid);
  font-variant-numeric: tabular-nums;
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-faq .faq-topic__index {
    color: transparent;
    -webkit-text-stroke: 1px var(--grid);
  }
}

.page-faq .faq-topic__kicker {
  margin: 0 0 4px;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.page-faq .faq-topic__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.7vw, 28px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-faq .faq-topic__scene {
  margin: 0 0 18px;
  padding-left: 14px;
  border-left: 2px solid var(--ember);
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.8;
}

/* 步骤 */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 14px;
  padding: 13px 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-steps li:first-child {
  border-top: 0;
  padding-top: 2px;
}

.page-faq .faq-steps__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin-top: 1px;
  border-radius: 999px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-steps h3 {
  margin: 0 0 4px;
  color: var(--fog);
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
}

.page-faq .faq-steps p {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.8;
}

.page-faq .faq-steps a {
  color: var(--fog);
  text-decoration: underline;
  text-decoration-color: var(--grid);
  text-underline-offset: 3px;
}

.page-faq .faq-steps a:hover {
  color: var(--signal);
  text-decoration-color: var(--signal);
}

/* 图片 */
.page-faq .faq-shot {
  margin: 4px 0 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--faq-inset);
}

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

/* 手风琴 */
.page-faq .faq-fold {
  margin-top: 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  background: var(--faq-inset);
  overflow: hidden;
  transition: border-color 0.2s var(--ease);
}

.page-faq .faq-fold[open] {
  border-color: var(--line);
}

.page-faq .faq-fold summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  color: var(--fog);
  font-size: 14.5px;
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-fold summary::after {
  content: "+";
  flex: none;
  color: var(--signal);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
}

.page-faq .faq-fold[open] summary::after {
  content: "−";
}

.page-faq .faq-fold summary:hover {
  background: rgba(23, 59, 48, 0.6);
}

.page-faq .faq-fold summary:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: -2px;
}

.page-faq .faq-fold p {
  margin: 0;
  padding: 0 16px 16px;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.85;
}

.page-faq .faq-fold a {
  color: var(--fog);
  text-decoration: underline;
  text-decoration-color: var(--grid);
  text-underline-offset: 3px;
}

.page-faq .faq-fold a:hover {
  color: var(--signal);
}

/* 行内按钮组 */
.page-faq .faq-topic__more {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 0;
}

/* 页尾 */
.page-faq .faq-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(28px, 4.5vw, 48px);
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-foot__text {
  margin: 0;
  color: var(--grid);
  font-size: 14px;
  line-height: 1.75;
}

.page-faq .faq-top {
  padding: 10px 20px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--fog);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-top:hover,
.page-faq .faq-top:focus-visible {
  color: var(--ink);
  background: var(--signal);
  border-color: var(--signal);
}

@media (min-width: 560px) {
  .page-faq .faq-toc__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-steps li {
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 16px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-faq .faq-hero__media {
    transform: rotate(-2.2deg) translateY(8px);
  }

  .page-faq .faq-layout {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: clamp(32px, 3.4vw, 56px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 88px;
    align-self: start;
    background: transparent;
    border-color: transparent;
    padding: 0 0 0 4px;
  }

  .page-faq .faq-toc__list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-toc__list a {
    padding: 10px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__media {
    transform: none;
  }

  .page-faq .faq-toc__list a,
  .page-faq .faq-fold,
  .page-faq .faq-top {
    transition: none;
  }
}