.page-faq {
  --faq-rail-w: 252px;
  --faq-gap: clamp(18px, 2.6vw, 42px);
  --faq-line: rgba(199, 206, 218, .18);
  --faq-line-strong: rgba(199, 206, 218, .34);
  background: var(--ink-night);
  color: var(--text-hi);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: clamp(44px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.4vw, 52px) 0 clamp(22px, 3.4vw, 40px);
  border-bottom: 1px solid var(--faq-line);
  background:
    radial-gradient(120% 92% at 88% 0%, rgba(34, 224, 214, .15), transparent 62%),
    linear-gradient(180deg, var(--stand-blue), var(--ink-night) 84%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -16%;
  width: 54%;
  height: 240%;
  background: repeating-linear-gradient(105deg, rgba(199, 206, 218, .085) 0 1px, transparent 1px 26px);
  transform: rotate(-6deg);
  pointer-events: none;
}

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

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(16px, 3vw, 28px);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-faq .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-faq .crumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .crumbs span[aria-current] {
  color: var(--text-hi);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 38px);
}

.page-faq .eyebrow {
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan);
  margin: 0;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 14px;
  font-family: var(--font-h);
  font-weight: 700;
  font-size: clamp(30px, 6vw, 56px);
  line-height: 1.12;
  letter-spacing: -.015em;
  color: #fff;
}

.page-faq .faq-hero__intro {
  max-width: 62ch;
  margin: 0;
  font-size: 16.5px;
  color: var(--mist);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(18px, 3vw, 28px);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding-top: 16px;
  border-top: 1px solid var(--faq-line-strong);
}

.page-faq .scoreline {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq .scoreline__num {
  font-family: var(--font-num);
  font-weight: 800;
  font-size: clamp(30px, 8vw, 52px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-faq .scoreline:nth-child(3) .scoreline__num {
  color: var(--hot);
}

.page-faq .scoreline__label {
  font-size: 12.5px;
  line-height: 1.4;
  letter-spacing: .03em;
  color: var(--mist);
}

.page-faq .frame {
  display: block;
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--track-blue);
  border: 1px solid var(--faq-line);
  border-radius: 3px;
}

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

.page-faq .faq-hero__frame {
  margin-top: clamp(20px, 3.6vw, 36px);
  aspect-ratio: 16 / 9;
}

.page-faq .faq-hero__frame::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan), var(--hot));
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(26px, 4vw, 50px);
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-rail {
  background: var(--stand-blue);
  border: 1px solid var(--faq-line);
  border-radius: 3px;
  padding: 12px;
}

.page-faq .index-rail__head {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--faq-line);
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mist);
}

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

.page-faq .faq-rail__list li {
  flex: none;
}

.page-faq .index-rail__link {
  display: grid;
  grid-template-columns: auto auto auto;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border-radius: 2px;
  border-bottom: 2px solid transparent;
  color: var(--text-hi);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.35;
  white-space: nowrap;
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}

.page-faq .index-rail__link:hover {
  background: var(--track-blue);
  color: #fff;
}

.page-faq .index-rail__link[aria-current="true"] {
  background: var(--track-blue);
  border-bottom-color: var(--cyan);
  color: #fff;
}

.page-faq .faq-rail__num {
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-rail__name {
  font-family: var(--font-h);
  font-weight: 600;
}

.page-faq .faq-rail__count {
  font-family: var(--font-num);
  font-size: 12.5px;
  font-weight: 700;
  line-height: 1.4;
  padding: 0 7px;
  border: 1px solid var(--faq-line-strong);
  border-radius: 999px;
  color: var(--mist);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  margin-bottom: clamp(22px, 3.4vw, 34px);
  background: var(--stand-blue);
  border: 1px solid var(--faq-line);
  border-radius: 3px;
}

.page-faq .faq-filters__label {
  margin-right: 4px;
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 8px 14px;
  background: transparent;
  border: 1px solid var(--faq-line-strong);
  border-radius: 999px;
  color: var(--text-hi);
  font-family: var(--font-body);
  font-size: 13.5px;
  cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-chip:hover {
  border-color: var(--cyan);
  color: #fff;
}

.page-faq .faq-chip.is-on,
.page-faq .faq-chip[aria-pressed="true"] {
  background: rgba(34, 224, 214, .15);
  border-color: var(--cyan);
  color: #fff;
}

.page-faq .faq-chip__n {
  font-family: var(--font-num);
  font-size: 12.5px;
  color: var(--mist);
}

.page-faq .faq-chip.is-on .faq-chip__n,
.page-faq .faq-chip[aria-pressed="true"] .faq-chip__n {
  color: var(--cyan);
}

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

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 62px);
}

.page-faq .faq-group__head {
  margin-bottom: 16px;
}

.page-faq .faq-group__head .h-sec {
  margin: 6px 0 8px;
  font-family: var(--font-h);
  font-weight: 700;
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.25;
  letter-spacing: -.01em;
  color: #fff;
}

.page-faq .faq-group__lede {
  max-width: 68ch;
  margin: 0;
  font-size: 15.5px;
  color: var(--mist);
}

.page-faq .faq-inline-frame {
  margin-bottom: 16px;
  aspect-ratio: 3 / 2;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .faq-item {
  position: relative;
  background: var(--stand-blue);
  border: 1px solid var(--faq-line);
  border-radius: 3px;
  transition: background .24s var(--ease), border-color .24s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--faq-line-strong);
}

.page-faq .faq-item:has(.faq-toggle[aria-expanded="true"]) {
  background: var(--track-blue);
  border-color: rgba(34, 224, 214, .34);
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-toggle {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 52px;
  padding: 14px 16px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  color: var(--text-hi);
  font-family: var(--font-h);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.5;
}

.page-faq .faq-toggle__mark {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  flex: none;
  background: var(--cyan);
  color: var(--ink-black);
  border-radius: 2px;
  font-family: var(--font-serif);
  font-size: 12.5px;
  font-weight: 700;
}

.page-faq .faq-toggle__sign {
  position: relative;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .faq-toggle__sign::before,
.page-faq .faq-toggle__sign::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform .24s var(--ease), opacity .24s var(--ease);
}

.page-faq .faq-toggle__sign::before {
  left: 0;
  right: 0;
  top: 6px;
  height: 1.5px;
}

.page-faq .faq-toggle__sign::after {
  top: 0;
  bottom: 0;
  left: 6px;
  width: 1.5px;
}

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

.page-faq .faq-item__a {
  padding: 4px 16px 18px 50px;
  animation: faqRise .24s var(--ease);
}

@keyframes faqRise {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  font-size: 15.5px;
  color: var(--mist);
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, .42);
}

.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 步骤编号 ---------- */
.page-faq .faq-steps {
  counter-reset: fstep;
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .faq-steps li {
  counter-increment: fstep;
  position: relative;
  padding-left: 32px;
  font-size: 15.5px;
  line-height: 1.7;
  color: #DCE3F0;
}

.page-faq .faq-steps li::before {
  content: counter(fstep);
  position: absolute;
  left: 0;
  top: 3px;
  width: 21px;
  height: 21px;
  display: grid;
  place-items: center;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
  border: 1px solid rgba(34, 224, 214, .48);
  border-radius: 50%;
  line-height: 1;
}

.page-faq .faq-steps li a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, .42);
}

/* ---------- 尾段：仍未解决 ---------- */
.page-faq .faq-end__card {
  position: relative;
  padding: clamp(22px, 3.4vw, 40px);
  background: var(--paper);
  color: var(--ink-black);
  border-left: 4px solid var(--hot);
  border-radius: 2px;
}

.page-faq .faq-end__card .eyebrow {
  color: var(--deep-teal);
}

.page-faq .faq-end__title {
  margin: 8px 0 16px;
  font-family: var(--font-h);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink-black);
}

.page-faq .faq-steps--paper li {
  color: var(--ink-black);
}

.page-faq .faq-steps--paper li::before {
  color: var(--deep-teal);
  border-color: rgba(11, 122, 114, .52);
}

.page-faq .faq-steps--paper li a {
  color: var(--deep-teal);
  border-bottom-color: rgba(11, 122, 114, .45);
}

.page-faq .faq-end__note {
  margin: 14px 0 20px;
  font-size: 15px;
  color: var(--paper-gray);
}

.page-faq .faq-end__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-faq .faq-end__card .btn--ghost {
  color: var(--ink-black);
  border-color: rgba(18, 20, 28, .34);
}

.page-faq .faq-end__card .btn--ghost:hover {
  color: var(--deep-teal);
  border-color: var(--deep-teal);
}

.page-faq .copy-btn {
  min-height: 44px;
  padding: 10px 18px;
  background: transparent;
  border: 1px dashed rgba(18, 20, 28, .42);
  border-radius: 2px;
  color: var(--ink-black);
  font-family: var(--font-body);
  font-size: 14px;
  cursor: pointer;
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
}

.page-faq .copy-btn:hover {
  border-color: var(--deep-teal);
  color: var(--deep-teal);
}

.page-faq .copy-btn[data-copy-state="done"] {
  background: var(--deep-teal);
  border-style: solid;
  border-color: var(--deep-teal);
  color: #fff;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-list {
    position: relative;
    padding-left: 22px;
  }

  .page-faq .faq-list::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--faq-line-strong), rgba(199, 206, 218, .08));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .72fr);
    align-items: end;
  }

  .page-faq .faq-stats {
    padding-top: 18px;
  }
}

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

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
    align-self: start;
    padding: 14px;
  }

  .page-faq .faq-rail__list {
    display: grid;
    gap: 3px;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-faq .index-rail__link {
    grid-template-columns: 26px minmax(0, 1fr) auto;
    padding: 10px 11px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    white-space: normal;
    font-size: 14px;
  }

  .page-faq .index-rail__link[aria-current="true"] {
    border-bottom-color: transparent;
    border-left-color: var(--cyan);
  }
}

@media (max-width: 560px) {
  .page-faq .faq-item__a {
    padding: 2px 14px 16px 14px;
  }

  .page-faq .faq-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .page-faq .scoreline__num {
    font-size: 30px;
  }

  .page-faq .scoreline__label {
    font-size: 11.5px;
  }
}

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

  .page-faq .index-rail__link,
  .page-faq .faq-chip,
  .page-faq .faq-item,
  .page-faq .copy-btn,
  .page-faq .faq-toggle__sign::before,
  .page-faq .faq-toggle__sign::after {
    transition-duration: .12s;
  }
}