/* ===================== 帮助中心 · 页面专属 ===================== */
.page-faq {
  --faq-rail-w: 236px;
  --faq-rail-gap: clamp(32px, 5vw, 84px);
  --faq-line: rgba(30, 122, 110, .16);
  --faq-ink-soft: rgba(6, 23, 28, .74);

  background: var(--jn-paper);
  color: var(--jn-ink);
  overflow-x: clip;
}

/* ---------- 首屏：深色框景条带 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  margin-top: calc(-1 * var(--jn-header-h));
  padding-top: calc(var(--jn-header-h) + clamp(18px, 3.5vw, 52px));
  padding-bottom: clamp(40px, 6vw, 76px);
  overflow: hidden;
}

.page-faq .faq-hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-faq .faq-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: .52;
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(178deg, rgba(6, 23, 28, .95) 0%, rgba(6, 23, 28, .78) 42%, rgba(6, 23, 28, .97) 100%),
    radial-gradient(120% 100% at 84% 6%, rgba(46, 91, 255, .26), transparent 62%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: calc(var(--jn-header-h) + 26px);
  bottom: 30px;
  right: var(--jn-gutter);
  width: 1px;
  background: repeating-linear-gradient(180deg, rgba(159, 211, 199, .45) 0 1px, transparent 1px 15px);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  padding-left: clamp(0px, 2.6vw, 34px);
}

.page-faq .faq-hero__inner::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: repeating-linear-gradient(180deg, rgba(159, 211, 199, .55) 0 1px, transparent 1px 13px);
}

.page-faq .faq-hero .jn-breadcrumb {
  color: rgba(244, 247, 245, .55);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero .jn-breadcrumb__link {
  color: rgba(244, 247, 245, .82);
  text-decoration: none;
}

.page-faq .faq-hero .jn-breadcrumb__link:hover {
  color: var(--jn-paper);
}

.page-faq .faq-hero__kicker {
  color: var(--jn-teal-200);
}

.page-faq .faq-hero__title {
  font-family: var(--jn-font-head);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(2.05rem, 5.2vw, 3.9rem);
  line-height: 1.06;
  color: var(--jn-paper);
  margin: .3em 0 0;
  max-width: 15ch;
}

.page-faq .faq-hero__lede {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.05vw, 17px);
  line-height: 1.78;
  color: rgba(244, 247, 245, .8);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(22px, 4vw, 52px);
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid rgba(159, 211, 199, .28);
}

.page-faq .faq-hero__fact {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  letter-spacing: .02em;
  color: rgba(244, 247, 245, .62);
}

.page-faq .faq-hero__fact b {
  font-family: var(--jn-font-mono);
  font-weight: 600;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--jn-neon);
  font-variant-numeric: tabular-nums;
}

/* ---------- 索引 + 问答流 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 44px);
  padding-top: clamp(44px, 6vw, 88px);
  padding-bottom: clamp(52px, 7vw, 104px);
}

.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-family: var(--jn-font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--jn-gray);
}

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

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

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

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--jn-teal-700);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--faq-line);
  background: rgba(255, 255, 255, .7);
  transition: color .2s var(--jn-ease), border-color .2s var(--jn-ease), background-color .2s var(--jn-ease);
}

.page-faq .faq-rail__link:hover {
  color: var(--jn-red);
  border-color: rgba(215, 38, 61, .4);
  background: var(--jn-red-100);
}

.page-faq .faq-rail__link[aria-current="true"] {
  color: var(--jn-ink);
  border-color: var(--jn-red);
  background: var(--jn-red-100);
}

.page-faq .faq-rail__no {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--jn-gray);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--jn-header-h-compact) + 28px);
  margin-bottom: clamp(48px, 6.5vw, 88px);
}

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

.page-faq .faq-group__head {
  padding-left: 18px;
  border-left: 2px solid var(--jn-teal-500);
}

.page-faq .faq-group__num {
  margin: 0;
}

.page-faq .faq-group__title {
  font-family: var(--jn-font-head);
  font-weight: 900;
  letter-spacing: -.012em;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  line-height: 1.2;
  margin: 8px 0 0;
  color: var(--jn-ink);
}

.page-faq .faq-group__intro {
  margin: 12px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--jn-gray);
}

.page-faq .faq-list {
  padding-left: 18px;
  margin-top: clamp(20px, 3vw, 32px);
}

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

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  min-height: 44px;
  padding: 18px 4px;
  list-style: none;
  cursor: pointer;
  font-family: var(--jn-font-head);
  font-weight: 700;
  font-size: clamp(.94rem, 1.05vw, 1.05rem);
  line-height: 1.55;
  color: var(--jn-ink);
  transition: color .2s var(--jn-ease), background-color .2s var(--jn-ease);
}

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

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

.page-faq .faq-item__q:hover {
  color: var(--jn-teal-700);
  background-color: rgba(30, 122, 110, .05);
}

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

.page-faq .faq-item__num {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--jn-teal-500);
}

.page-faq .faq-item__mark {
  position: relative;
  width: 13px;
  height: 13px;
  flex: none;
  align-self: center;
  justify-self: end;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--jn-teal-500);
  transition: transform .24s var(--jn-ease), background-color .24s var(--jn-ease);
}

.page-faq .faq-item__mark::before {
  width: 13px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 13px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  background: var(--jn-red);
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
  background: var(--jn-red);
}

.page-faq .faq-item__a {
  margin-left: 16px;
  padding: 0 4px clamp(18px, 2.4vw, 26px) 20px;
  border-left: 1px solid var(--faq-line);
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--faq-ink-soft);
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-answer-in .24s var(--jn-ease) both;
}

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

.page-faq .faq-inline-link {
  color: var(--jn-teal-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 122, 110, .4);
  transition: color .2s var(--jn-ease), border-color .2s var(--jn-ease);
}

.page-faq .faq-inline-link:hover {
  color: var(--jn-red);
  border-bottom-color: var(--jn-red);
}

.page-faq .faq-figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding-left: 18px;
}

/* ---------- 收束 ---------- */
.page-faq .faq-outro {
  position: relative;
  padding-top: clamp(40px, 6vw, 76px);
  padding-bottom: clamp(72px, 12vw, 168px);
  border-top: 1px solid var(--faq-line);
  background: linear-gradient(180deg, rgba(30, 122, 110, .06), rgba(30, 122, 110, 0) 46%);
}

.page-faq .faq-outro__ribbon {
  display: block;
  width: 100%;
  height: 40px;
  margin: 0 0 clamp(24px, 4vw, 48px);
  color: var(--jn-teal-500);
  opacity: .5;
}

.page-faq .faq-outro__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 4vw, 56px);
}

.page-faq .faq-outro__num {
  margin: 0;
}

.page-faq .faq-outro__title {
  font-family: var(--jn-font-head);
  font-weight: 900;
  letter-spacing: -.015em;
  font-size: clamp(1.5rem, 3vw, 2.35rem);
  line-height: 1.18;
  margin: 10px 0 0;
}

.page-faq .faq-outro__text {
  margin: 16px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

.page-faq .faq-outro__text .jn-mono {
  color: var(--jn-teal-700);
  font-size: .95em;
  word-break: break-all;
}

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

.page-faq .faq-outro__link-item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-outro__link-no {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--jn-teal-500);
}

.page-faq .faq-outro__link {
  flex: 1;
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 14px 4px;
  font-size: 15px;
  color: var(--jn-ink);
  text-decoration: none;
  transition: color .2s var(--jn-ease);
}

.page-faq .faq-outro__link::after {
  content: "→";
  margin-left: auto;
  font-family: var(--jn-font-mono);
  color: var(--jn-teal-500);
  transition: transform .2s var(--jn-ease), color .2s var(--jn-ease);
}

.page-faq .faq-outro__link:hover {
  color: var(--jn-red);
}

.page-faq .faq-outro__link:hover::after {
  color: var(--jn-red);
  transform: translateX(4px);
}

/* ---------- 响应式 ---------- */
@media (max-width: 599px) {
  .page-faq .faq-hero__inner::before {
    display: none;
  }

  .page-faq .faq-rail__title {
    font-size: 10px;
    letter-spacing: .16em;
  }

  .page-faq .faq-rail__link {
    padding: 10px 13px;
    font-size: 12.5px;
  }

  .page-faq .faq-list,
  .page-faq .faq-figure {
    padding-left: 10px;
  }

  .page-faq .faq-group__head {
    padding-left: 14px;
  }

  .page-faq .faq-item__q {
    gap: 9px;
    padding: 16px 2px;
  }

  .page-faq .faq-item__a {
    margin-left: 8px;
    padding-left: 14px;
  }
}

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

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--jn-header-h-compact) + 28px);
    align-self: start;
  }

  .page-faq .faq-rail__title {
    margin-bottom: 18px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--faq-line);
  }

  .page-faq .faq-rail__list > li {
    width: 100%;
  }

  .page-faq .faq-rail__link {
    display: flex;
    width: 100%;
    margin-left: -1px;
    padding: 12px 14px;
    font-size: 14px;
    color: var(--jn-gray);
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
  }

  .page-faq .faq-rail__link:hover {
    color: var(--jn-teal-700);
    background: rgba(30, 122, 110, .06);
  }

  .page-faq .faq-rail__link[aria-current="true"] {
    color: var(--jn-ink);
    border-left-color: var(--jn-red);
    background: rgba(30, 122, 110, .07);
  }
}

@media (min-width: 840px) {
  .page-faq .faq-outro__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(48px, 6vw, 104px);
    align-items: start;
  }
}

@media (max-width: 1023px) {
  .page-faq .faq-hero::after {
    display: none;
  }
}

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

  .page-faq .faq-outro__link::after,
  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after {
    transition: none;
  }
}