/* ===================== 使用答疑页 ===================== */
.page-faq {
  --faq-sticky: 136px;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(22px, 3.6vw, 36px) 0 clamp(34px, 5vw, 62px);
  background: var(--ink-850);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--cyan) 0%,
    var(--cyan) 34%,
    var(--orange) 34%,
    var(--orange) 58%,
    var(--line) 58%,
    var(--line) 100%
  );
}

.page-faq .faq-hero .crumbs {
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.page-faq .faq-hero__lead > * + * {
  margin-top: 16px;
}

.page-faq .faq-hero__lead h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 6.4vw, 64px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ice);
  margin: 0;
  max-width: 18ch;
}

.page-faq .faq-hero__text {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--fog);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 6px;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

.page-faq .faq-hero__media .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-faq .faq-hero__media .media__caption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fog);
  border-top: 1px solid var(--line);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-body {
  padding: clamp(30px, 4.6vw, 58px) 0 clamp(48px, 7vw, 96px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 44px);
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 244px minmax(0, 1fr);
    gap: clamp(32px, 4.6vw, 68px);
  }
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-index__head {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fog);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--panel);
  color: var(--fog);
  font-size: 14px;
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--ice);
  border-color: var(--cyan);
  background: var(--panel-2);
  outline: none;
}

.page-faq .faq-index__link:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan);
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
}

@media (min-width: 1024px) {
  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky);
    align-self: start;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-index__item + .faq-index__item {
    margin-top: 2px;
  }

  .page-faq .faq-index__link {
    display: flex;
    padding: 11px 12px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: transparent;
    white-space: normal;
    font-size: 15px;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--cyan);
    background: var(--panel);
    box-shadow: none;
  }
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(38px, 5vw, 66px);
  scroll-margin-top: 150px;
}

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

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px 16px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  font-family: var(--font-display);
  font-size: clamp(34px, 4.6vw, 50px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-faq .faq-group__head h2 {
  margin: 0 0 6px;
  font-size: clamp(21px, 2.8vw, 29px);
  line-height: 1.25;
  color: var(--ice);
}

.page-faq .faq-group__head p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--fog);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 8px 14px;
  align-items: start;
  padding: 18px 4px;
  cursor: pointer;
  list-style: none;
  color: var(--ice);
  font-size: clamp(15.5px, 1.9vw, 17px);
  line-height: 1.6;
  transition: color 0.15s ease;
}

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

.page-faq .qa__q::marker {
  content: "";
}

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

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

.page-faq .qa__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--fog-dim);
  transition: color 0.15s ease;
}

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

.page-faq .qa__mark {
  position: relative;
  display: block;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--fog);
  transition: transform 0.18s ease, background-color 0.18s ease;
}

.page-faq .qa__mark::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 2px;
}

.page-faq .qa__mark::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--cyan);
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
}

.page-faq .qa__a {
  margin-left: 30px;
  padding: 2px 0 20px 18px;
  border-left: 1px solid var(--line);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
}

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

.page-faq .qa__a strong {
  color: var(--ice);
  font-weight: 600;
}

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

.page-faq .qa__a a:hover,
.page-faq .qa__a a:focus-visible {
  color: var(--ice);
}

/* ---------- 勘误区块 ---------- */
.page-faq .faq-step-media {
  margin: clamp(22px, 3vw, 32px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

.page-faq .faq-step-media .media__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.page-faq .faq-step-media .media__caption {
  padding: 10px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--fog);
  border-top: 1px solid var(--line);
}

.page-faq .faq-steps {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-faq .faq-steps__item {
  border-top: 2px solid var(--line);
  padding-top: 14px;
}

.page-faq .faq-steps__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-faq .faq-steps__item h3 {
  margin: 8px 0 6px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--ice);
}

.page-faq .faq-steps__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--fog);
}

@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

/* ---------- 求助面板 ---------- */
.page-faq .faq-help {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px 18px;
  align-items: start;
  padding: clamp(22px, 3.4vw, 36px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius-lg);
  background: var(--panel);
}

.page-faq .faq-help__num {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.02em;
  color: var(--orange);
}

.page-faq .faq-help__body h2 {
  margin: 0 0 10px;
  font-size: clamp(20px, 2.6vw, 26px);
  line-height: 1.3;
  color: var(--ice);
}

.page-faq .faq-help__body > p {
  margin: 0 0 18px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--fog);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2px 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-help__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--fog);
}

.page-faq .faq-help__val {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ice);
  word-break: break-word;
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 560px) {
  .page-faq .faq-help__row {
    grid-template-columns: 96px minmax(0, 1fr);
    align-items: baseline;
  }
}

/* ---------- 动效与可达性 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-faq .qa[open] .qa__mark::after {
    transform: none;
  }
}
<<<END>>>