.page-faq {
  --faq-idx: 260px;
  --faq-gap: 34px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: 26px clamp(30px, 6vw, 62px);
  border-bottom: 2px solid var(--line);
  background:
    linear-gradient(135deg, rgba(47, 240, 220, .13) 0%, transparent 44%),
    linear-gradient(315deg, rgba(255, 122, 51, .15) 0%, transparent 38%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -24%;
  right: -20%;
  width: min(320px, 58vw);
  aspect-ratio: 1 / 1;
  background: var(--panel);
  border: 2px solid var(--line-strong);
  transform: rotate(12deg);
  pointer-events: none;
}

.page-faq .faq-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .crumbs {
  margin-bottom: 22px;
}

.page-faq .faq-hero .h1 {
  margin: 10px 0 18px;
  font-size: clamp(30px, 6.4vw, 62px);
  line-height: 1.06;
  max-width: 20ch;
}

.page-faq .faq-hero .lede {
  max-width: 62ch;
}

/* ---------- 三步排查路径 ---------- */
.page-faq .faq-path__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-faq .faq-path__step {
  position: relative;
  padding: 18px 16px 22px;
  border: 2px solid var(--line-strong);
  border-top: 4px solid var(--tone, var(--cyan));
  background: var(--panel);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, .38);
}

.page-faq .faq-path__step[data-tone="cyan"] { --tone: var(--cyan); }
.page-faq .faq-path__step[data-tone="amber"] { --tone: var(--export); }
.page-faq .faq-path__step[data-tone="green"] { --tone: var(--green); }

.page-faq .faq-path__num {
  display: block;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--tone, var(--cyan));
  margin-bottom: 8px;
}

.page-faq .faq-path__step .h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.page-faq .faq-path__step p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

.page-faq .faq-figure {
  margin: 26px 0 0;
  border: 2px solid var(--line);
  background: var(--panel);
}

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

.page-faq .faq-figure .media__cap {
  padding: 10px 14px;
  border-top: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--muted);
}

/* ---------- 筛选栏 ---------- */
.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 26px;
  padding-bottom: 18px;
  border-bottom: 2px solid var(--line);
}

.page-faq .filter-count {
  margin-left: auto;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

/* ---------- 双栏问答流 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
}

.page-faq .faq-index {
  border: 2px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-index__title {
  margin: 0;
  padding: 11px 14px;
  border-bottom: 2px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  overflow-x: auto;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 12px 15px;
  border-right: 1px solid var(--line);
  border-left: 4px solid transparent;
  color: var(--paper);
  text-decoration: none;
  font-size: 15px;
  white-space: nowrap;
  transition: background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--cyan);
  background: rgba(47, 240, 220, .09);
  color: var(--cyan);
}

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

/* ---------- 问题分组 ---------- */
.page-faq .qa-group {
  margin-bottom: 38px;
  scroll-margin-top: calc(var(--bar-h) + 22px);
}

.page-faq .qa-group[data-tone="login"] { --tone: var(--novice); }
.page-faq .qa-group[data-tone="filter"] { --tone: var(--library); }
.page-faq .qa-group[data-tone="export"] { --tone: var(--export); }
.page-faq .qa-group[data-tone="family"] { --tone: var(--family); }
.page-faq .qa-group[data-tone="device"] { --tone: var(--cyan); }
.page-faq .qa-group[data-tone="prep"] { --tone: var(--orange); }

.page-faq .qa-group__title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--line-strong);
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 27px);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.2;
  color: var(--paper);
}

.page-faq .qa-group__title::before {
  content: "";
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  background: var(--tone, var(--cyan));
}

/* ---------- 单条问答 ---------- */
.page-faq .faq-q {
  margin-bottom: 10px;
}

.page-faq .faq-q__inner {
  border: 2px solid var(--line);
  border-left: 4px solid var(--line-strong);
  background: var(--panel);
  transition: border-color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-q__inner[open] {
  border-left-color: var(--tone, var(--cyan));
  background:
    linear-gradient(90deg, rgba(47, 240, 220, .06) 0%, transparent 58%),
    var(--panel);
}

.page-faq .faq-q__title {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color .18s var(--ease);
}

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

.page-faq .faq-q__title::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  width: 22px;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1.3;
  text-align: center;
  color: var(--tone, var(--cyan));
}

.page-faq .faq-q__inner[open] .faq-q__title::after {
  content: "–";
}

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

.page-faq .faq-q__title:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -4px;
}

.page-faq .faq-q__body {
  padding: 0 16px 17px;
  border-top: 1px dashed var(--line);
  padding-top: 13px;
  margin-top: 0;
}

.page-faq .faq-q__body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(244, 247, 255, .86);
}

/* ---------- 联系前的自查 ---------- */
.page-faq .faq-prep {
  border: 2px solid var(--line-strong);
  border-left: 5px solid var(--family);
  background: var(--panel);
  padding: 20px 18px 22px;
}

.page-faq .faq-prep__lead {
  margin: 0 0 16px;
  color: var(--paper);
  font-size: 15.5px;
  line-height: 1.75;
}

.page-faq .faq-prep__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-prep__item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  color: rgba(244, 247, 255, .9);
  font-size: 15px;
  line-height: 1.72;
}

.page-faq .faq-prep__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-prep__num {
  flex: 0 0 auto;
  margin-top: 3px;
  padding: 2px 7px;
  border: 2px solid var(--line-strong);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--export);
}

.page-faq .faq-prep__note {
  margin: 0 0 18px;
  padding: 13px 14px;
  border: 2px solid var(--line);
  border-left: 4px solid var(--orange);
  background: rgba(255, 122, 51, .08);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.85;
  letter-spacing: .02em;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-prep__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-more {
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 2px solid var(--line);
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

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

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

/* ---------- 窄屏保护 ---------- */
.page-faq .faq-index__link,
.page-faq .faq-q__title,
.page-faq .faq-q__body p,
.page-faq .faq-prep__item,
.page-faq .faq-prep__note {
  overflow-wrap: anywhere;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-path__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-index__list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow: visible;
  }

  .page-faq .faq-index__link {
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    justify-content: flex-start;
  }

  .page-faq .faq-prep__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 22px;
  }

  .page-faq .faq-prep__item:nth-last-child(-n+2) {
    border-bottom: 0;
    padding-bottom: 0;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-hero::before {
    width: min(500px, 38vw);
    right: -5%;
    top: -36%;
  }

  .page-faq .faq-hero .lede {
    max-width: 56ch;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-idx) minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 22px);
  }

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

  .page-faq .faq-index__link {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    white-space: normal;
    padding: 13px 15px;
  }

  .page-faq .faq-index__item:last-child .faq-index__link {
    border-bottom: 0;
  }

  .page-faq .faq-path__step::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -19px;
    width: 13px;
    height: 13px;
    border-top: 3px solid var(--cyan);
    border-right: 3px solid var(--cyan);
    transform: translateY(-50%) rotate(45deg);
  }

  .page-faq .faq-path__step:last-child::after {
    display: none;
  }

  .page-faq .faq-figure--side {
    max-width: 720px;
  }

  .page-faq .faq-prep {
    padding: 24px 24px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q__inner,
  .page-faq .faq-q__title,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>