.page-faq {
  --faq-cyan: #5BE0E6;
  --faq-violet: #A99CFF;
  --faq-rail-w: 240px;
}

/* ---------- 面包屑与页首 ---------- */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--dim);
}

.page-faq .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--lime);
}

.page-faq .page-head {
  padding: clamp(26px, 4vw, 52px) 0 clamp(30px, 4vw, 50px);
  border-bottom: 1px solid var(--line);
}

.page-faq .page-head__title {
  margin: 18px 0 20px;
  max-width: 18em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 4.6vw, 56px);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .page-head__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.3vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 60px);
  padding: clamp(34px, 5vw, 76px) 0 clamp(48px, 6vw, 96px);
}

/* ---------- 左侧分类色带 ---------- */
.page-faq .faq-rail {
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.page-faq .faq-rail__label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 8px 13px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.4;
  transition: color var(--t-fast);
}

.page-faq .faq-rail__bar {
  width: 4px;
  height: 20px;
  flex: none;
  background: var(--dim);
  transition: height var(--t-fast), background var(--t-fast);
}

.page-faq .faq-rail__list > .faq-rail__item:nth-child(1) .faq-rail__bar { background: var(--lime); }
.page-faq .faq-rail__list > .faq-rail__item:nth-child(2) .faq-rail__bar { background: var(--orange); }
.page-faq .faq-rail__list > .faq-rail__item:nth-child(3) .faq-rail__bar { background: var(--faq-cyan); }
.page-faq .faq-rail__list > .faq-rail__item:nth-child(4) .faq-rail__bar { background: var(--faq-violet); }

.page-faq .faq-rail__num {
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--dim);
  transition: color var(--t-fast);
}

.page-faq .faq-rail__name {
  flex: 1 1 auto;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible,
.page-faq .faq-rail__link.is-active {
  color: var(--ink);
}

.page-faq .faq-rail__link:hover .faq-rail__bar,
.page-faq .faq-rail__link:focus-visible .faq-rail__bar {
  height: 28px;
}

.page-faq .faq-rail__link.is-active .faq-rail__num {
  color: var(--lime);
}

.page-faq .faq-rail__foot {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--dim);
}

/* ---------- 右侧问答区 ---------- */
.page-faq .faq-body {
  display: flex;
  flex-direction: column;
  gap: clamp(44px, 5vw, 72px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 32px);
  min-width: 0;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 4px minmax(0, 1fr);
  gap: 0 18px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__mark {
  grid-row: 1 / span 2;
  grid-column: 1;
  width: 4px;
  align-self: stretch;
  background: var(--dim);
}

.page-faq .faq-group__title {
  grid-column: 2;
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: -.005em;
  color: var(--ink);
}

.page-faq .faq-group__lede {
  grid-column: 2;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq #sec-download .faq-group__mark { background: var(--lime); }
.page-faq #sec-subscribe .faq-group__mark { background: var(--orange); }
.page-faq #sec-schedule .faq-group__mark { background: var(--faq-cyan); }
.page-faq #sec-account .faq-group__mark { background: var(--faq-violet); }

/* ---------- 问题条目 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 4px 20px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
  font-size: clamp(15px, 1.35vw, 17px);
  line-height: 1.55;
  transition: color var(--t-fast);
}

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

.page-faq .faq-item__q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--lime);
  opacity: 0;
  transition: opacity var(--t-fast);
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible,
.page-faq .faq-item[open] .faq-item__q {
  color: var(--lime);
}

.page-faq .faq-item__q:hover::before,
.page-faq .faq-item__q:focus-visible::before,
.page-faq .faq-item[open] .faq-item__q::before {
  opacity: 1;
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
}

.page-faq .faq-item__sign {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background: var(--lime);
  transition: transform var(--t-mid), opacity var(--t-mid);
}

.page-faq .faq-item__sign::before {
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  margin-top: -.5px;
}

.page-faq .faq-item__sign::after {
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  margin-left: -.5px;
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

/* ---------- 答案区（灰雪承载面） ---------- */
.page-faq .faq-item__a {
  margin: 0 0 20px;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--snow);
  border-left: 3px solid var(--lime);
  color: var(--snow-ink);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq #sec-download .faq-item__a { border-left-color: var(--lime); }
.page-faq #sec-subscribe .faq-item__a { border-left-color: var(--orange); }
.page-faq #sec-schedule .faq-item__a { border-left-color: var(--faq-cyan); }
.page-faq #sec-account .faq-item__a { border-left-color: var(--faq-violet); }

.page-faq .faq-item__a p {
  margin: 0 0 .85em;
}

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

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

.page-faq .faq-item__a a {
  color: var(--bg);
  text-decoration: none;
  border-bottom: 1px solid var(--lime);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--bg);
  background: var(--lime-soft);
}

.page-faq .faq-figure {
  margin: 20px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--snow-line);
  background: var(--snow-line);
}

.page-faq .faq-figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--snow-ink);
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  margin-top: clamp(24px, 4vw, 56px);
  padding: clamp(40px, 6vw, 88px) 0;
  background: var(--panel);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact__head {
  max-width: 66ch;
}

.page-faq .faq-contact__title {
  margin: 16px 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-faq .faq-contact__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(26px, 3.5vw, 44px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-contact__card {
  display: flex;
  flex-direction: column;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--bg);
}

.page-faq .faq-contact__num {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-faq .faq-contact__card-title {
  margin: 0 0 12px;
  font-family: var(--font-narrow);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: .02em;
  text-transform: uppercase;
  color: var(--ink);
}

.page-faq .faq-contact__text {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-contact__value {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--lime);
  word-break: break-all;
}

.page-faq .faq-contact__foot {
  margin: auto 0 0;
}

.page-faq .faq-contact__note {
  margin: clamp(20px, 2.5vw, 28px) 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--dim);
}

.page-faq .faq-contact__note a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color var(--t-fast);
}

.page-faq .faq-contact__note a:hover,
.page-faq .faq-contact__note a:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-rail__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 22px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-faq .faq-rail__list {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

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

@media (min-width: 1180px) {
  .page-faq {
    --faq-rail-w: 264px;
  }
}