/* ===================== 问题排查页 ===================== */
.page-faq {
  --faq-rail-w: 264px;
  --faq-line-x: 6px;
  background: var(--bg);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(18px, 3vw, 30px) 0 clamp(40px, 6vw, 78px);
  background:
    radial-gradient(110% 90% at 88% -20%, rgba(0, 240, 200, .13), transparent 62%),
    radial-gradient(80% 70% at -8% 112%, rgba(242, 179, 61, .07), transparent 60%),
    linear-gradient(180deg, var(--bg-2) 0%, var(--bg) 78%);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
  margin-top: clamp(20px, 3vw, 38px);
}

.page-faq .faq-hero__text h1 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.8vw, 60px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .faq-hero__text .lede {
  margin-top: clamp(16px, 2vw, 24px);
  max-width: 62ch;
  color: var(--muted);
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.8;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

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

.page-faq .faq-hero__media .media-frame {
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

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

.page-faq .media-frame__caption {
  padding: 12px 16px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (min-width: 980px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }
}

/* ---------- 正文骨架 ---------- */
.page-faq .faq-body {
  padding: clamp(44px, 6vw, 84px) 0 clamp(48px, 6vw, 88px);
  background: var(--bg);
}

.page-faq .faq-body__title {
  margin: 0 0 clamp(28px, 3.4vw, 46px);
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--text);
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

@media (min-width: 900px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 76px);
  }
}

/* ---------- 左侧排查轨道 ---------- */
.page-faq .faq-rail {
  position: relative;
}

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

.page-faq .faq-rail__list {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 4px 0 4px 32px;
  list-style: none;
  overflow: visible;
  border: 0;
}

.page-faq .faq-rail__list::before {
  content: "";
  position: absolute;
  left: var(--faq-line-x);
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 40%, var(--line) 100%);
}

.page-faq .faq-rail__tab {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  padding: 11px 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.45;
  text-align: left;
  cursor: pointer;
  transition: color .16s var(--ease);
}

.page-faq .faq-rail__tab:hover {
  color: var(--text);
}

.page-faq .faq-rail__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .12em;
  color: var(--line);
  transition: color .16s var(--ease);
}

.page-faq .faq-rail__label {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-rail__dot {
  position: absolute;
  left: -30px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -4.5px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--line);
  transition: background-color .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-faq .faq-rail__tab[aria-selected="true"] {
  color: var(--text);
}

.page-faq .faq-rail__tab[aria-selected="true"] .faq-rail__idx {
  color: var(--cyan);
}

.page-faq .faq-rail__tab[aria-selected="true"] .faq-rail__dot {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 5px rgba(0, 240, 200, .13);
}

@media (min-width: 900px) {
  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-rail__tag {
    display: block;
    position: absolute;
    left: -22px;
    top: 8px;
    margin: 0;
    writing-mode: vertical-rl;
    letter-spacing: .3em;
    font-size: 11px;
    color: var(--muted);
    pointer-events: none;
  }
}

/* ---------- 右侧问答面板 ---------- */
.page-faq .faq-panels {
  min-width: 0;
}

.page-faq .faq-panel {
  min-width: 0;
  scroll-margin-top: 100px;
}

.page-faq .faq-panel__media {
  margin: 0 0 clamp(24px, 3vw, 34px);
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

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

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

.page-faq .accordion__item:first-child {
  border-top: 1px solid var(--line);
}

.page-faq .accordion__trigger {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  width: 100%;
  padding: clamp(16px, 2vw, 22px) 0;
  border: 0;
  background: transparent;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(15px, 1.6vw, 17.5px);
  font-weight: 700;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color .16s var(--ease);
}

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

.page-faq .faq-q {
  flex: 1 1 auto;
  min-width: 0;
  transition: color .16s var(--ease);
}

.page-faq .faq-q__mark {
  position: relative;
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  margin-left: auto;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}

.page-faq .faq-q__mark::before {
  left: 0;
  top: 7.5px;
  width: 16px;
  height: 1px;
}

.page-faq .faq-q__mark::after {
  left: 7.5px;
  top: 0;
  width: 1px;
  height: 16px;
}

.page-faq .accordion__trigger[aria-expanded="true"] .faq-q__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .accordion__panel {
  padding: 0 0 clamp(18px, 2.4vw, 26px);
  max-width: 68ch;
  color: var(--muted);
  font-size: clamp(15px, 1.4vw, 16px);
  line-height: 1.8;
}

.page-faq .accordion__panel > p {
  margin: 0 0 10px;
}

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

.page-faq .faq-ref {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-faq .faq-ref a {
  color: var(--muted);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color .16s var(--ease);
}

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

/* ---------- 窄屏：轨道转横向标签条 ---------- */
@media (max-width: 899px) {
  .page-faq .faq-rail__list {
    flex-direction: row;
    gap: 0;
    padding: 0;
    overflow-x: auto;
    overflow-y: hidden;
    border-bottom: 1px solid var(--line);
    scrollbar-width: thin;
  }

  .page-faq .faq-rail__list::before {
    display: none;
  }

  .page-faq .faq-rail__tab {
    flex: 0 0 auto;
    align-items: center;
    padding: 12px 16px 11px;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    font-size: 14px;
  }

  .page-faq .faq-rail__tab[aria-selected="true"] {
    border-bottom-color: var(--cyan);
  }

  .page-faq .faq-rail__idx,
  .page-faq .faq-rail__dot {
    display: none;
  }
}

/* ---------- 尾部落点 ---------- */
.page-faq .faq-more {
  padding: clamp(38px, 5vw, 70px) 0 clamp(48px, 6vw, 88px);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  border-top: 1px solid var(--line);
}

.page-faq .faq-more__title {
  margin: 0 0 clamp(22px, 2.6vw, 34px);
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text);
}

.page-faq .faq-more__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

@media (min-width: 760px) {
  .page-faq .faq-more__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-more__card {
  position: relative;
  display: block;
  padding: 22px 20px 22px 24px;
  background: var(--panel);
  border-left: 2px solid var(--line);
  color: var(--text);
  text-decoration: none;
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-more__card:hover {
  border-left-color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .faq-more__card::after {
  content: "→";
  position: absolute;
  right: 18px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-more__card:hover::after {
  opacity: 1;
  transform: translateX(0);
}

.page-faq .faq-more__k {
  display: block;
  padding-right: 24px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-faq .faq-more__d {
  display: block;
  margin-top: 9px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-more__card,
  .page-faq .faq-more__card::after,
  .page-faq .faq-rail__dot,
  .page-faq .faq-rail__tab,
  .page-faq .faq-q,
  .page-faq .faq-q__mark::before,
  .page-faq .faq-q__mark::after {
    transition: none;
  }

  .page-faq .faq-more__card:hover {
    transform: none;
  }
}
<<<END>>>