.page-faq {
  background:
    radial-gradient(120% 70% at 82% -8%, rgba(63, 227, 210, .10), transparent 62%),
    linear-gradient(180deg, var(--ink-950) 0%, var(--ink-900) 46%, var(--ink-950) 100%);
  color: var(--text-hi);
  padding-block: clamp(26px, 4vw, 52px) clamp(48px, 7vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(2rem, 5.4vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.page-faq .faq-hero__title em {
  font-style: normal;
  color: var(--cyan-400);
}

.page-faq .faq-hero__lede {
  max-width: 33em;
  margin: 20px 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--text-mid);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--mist-300);
}

.page-faq .faq-hero__meta li {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-faq .faq-hero__meta li + li::before {
  content: "";
  display: block;
  width: 20px;
  height: 1px;
  background: var(--ink-700);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-faq .faq-hero__figure img,
.page-faq .faq-intro__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 刻度装饰线 ---------- */
.page-faq .faq-axis {
  height: 13px;
  margin-top: clamp(30px, 5vw, 54px);
  border-bottom: 1px solid var(--ink-700);
  background-image: repeating-linear-gradient(90deg, var(--ink-700) 0, var(--ink-700) 1px, transparent 1px, transparent 14px);
  opacity: .8;
}

/* ---------- 主体：侧栏 + 内容 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(30px, 5vw, 56px);
}

.page-faq .faq-aside__label {
  margin-bottom: 0;
}

.page-faq .faq-aside__list {
  display: flex;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-aside__item {
  flex: 0 0 auto;
}

.page-faq .faq-aside__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--ink-700);
  border-radius: var(--pill);
  font-size: 13px;
  line-height: 1.4;
  color: var(--text-mid);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-aside__num {
  font-size: 11px;
  color: var(--mist-300);
  letter-spacing: .05em;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-aside__link:hover,
.page-faq .faq-aside__link:focus-visible {
  color: var(--cyan-300);
  border-color: var(--cyan-400);
  background: var(--ink-800);
}

.page-faq .faq-aside__link:hover .faq-aside__num,
.page-faq .faq-aside__link:focus-visible .faq-aside__num {
  color: var(--cyan-400);
}

.page-faq .faq-aside__link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section + .faq-section {
  margin-top: clamp(42px, 6vw, 72px);
}

.page-faq .faq-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--ink-700);
}

.page-faq .faq-section__num {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan-400);
}

.page-faq .faq-section__title {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 23px);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-faq .faq-section__note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-300);
}

/* ---------- 三步上手 ---------- */
.page-faq .faq-intro {
  display: grid;
  gap: clamp(22px, 3.4vw, 36px);
  margin-top: clamp(22px, 3vw, 34px);
}

.page-faq .faq-intro__lede {
  margin: 0 0 8px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-mid);
}

.page-faq .flow-steps {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .flow-step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--ink-700);
}

.page-faq .flow-step:last-child {
  border-bottom: 1px solid var(--ink-700);
}

.page-faq .flow-step__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--pill);
  background: var(--ink-800);
  color: var(--cyan-400);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-faq .flow-step__title {
  margin: 4px 0 0;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--text-hi);
}

.page-faq .flow-step__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist-300);
}

.page-faq .faq-intro__figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* ---------- 手风琴 ---------- */
.page-faq .qa-list {
  margin-top: 8px;
}

.page-faq .qa {
  border-bottom: 1px solid var(--ink-700);
}

.page-faq .qa[open] {
  border-bottom-color: transparent;
}

.page-faq .qa__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 8px;
  list-style: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background var(--dur) var(--ease);
}

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

.page-faq .qa__summary:hover {
  background: var(--ink-800);
}

.page-faq .qa__summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .qa__num {
  flex: 0 0 auto;
  min-width: 2.9em;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
  color: var(--mist-300);
}

.page-faq .qa__title {
  flex: 1 1 auto;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--text-hi);
  transition: color var(--dur) var(--ease);
}

.page-faq .qa[open] .qa__title {
  color: var(--cyan-300);
}

.page-faq .qa__arrow {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 8px;
  border-top: 1.5px solid var(--cyan-400);
  border-right: 1.5px solid var(--cyan-400);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease);
}

.page-faq .qa[open] .qa__arrow {
  transform: rotate(135deg);
}

.page-faq .qa__body {
  margin: 0;
  padding: 18px 20px 20px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  background: var(--paper-050);
  color: var(--paper-ink);
  font-size: 15px;
  line-height: 1.85;
  max-width: var(--measure);
}

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

.page-faq .qa__body a {
  color: var(--paper-link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__body a:hover,
.page-faq .qa__body a:focus-visible {
  color: var(--paper-ink);
  background: var(--amber-100);
}

/* ---------- 数据修正区块 ---------- */
.page-faq .faq-section--fix .faq-section__head {
  border-bottom-color: var(--amber-400);
}

.page-faq .faq-section--fix .faq-section__num {
  color: var(--amber-400);
}

.page-faq .faq-section--fix .qa[open] .qa__title {
  color: var(--amber-400);
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-next {
  margin-top: clamp(42px, 6vw, 76px);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--ink-700);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--ink-800) 0%, var(--ink-900) 100%);
  box-shadow: var(--shadow-panel);
}

.page-faq .faq-next__title {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.35;
  color: var(--text-hi);
}

.page-faq .faq-next__text {
  margin: 14px 0 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-mid);
}

.page-faq .faq-next__text a {
  color: var(--cyan-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }

  .page-faq .faq-intro {
    grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: 224px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 32px;
  }

  .page-faq .faq-aside__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-aside__link {
    display: block;
    padding: 12px 0 12px 16px;
    border: 0;
    border-left: 1px solid var(--ink-700);
    border-radius: 0;
    white-space: normal;
    background: transparent;
    font-size: 13.5px;
  }

  .page-faq .faq-aside__link:hover,
  .page-faq .faq-aside__link:focus-visible {
    border-left-color: var(--cyan-400);
    background: transparent;
  }

  .page-faq .faq-aside__num {
    display: block;
    margin-bottom: 3px;
  }

  .page-faq .qa__title {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__arrow,
  .page-faq .qa__summary,
  .page-faq .qa__title,
  .page-faq .faq-aside__link {
    transition: none;
  }
}