/* ===== 支持中心 · 页面专属样式（作用域 .page-faq） ===== */

.page-faq {
  --faq-sticky-top: calc(var(--ls-bar-h) + 0.5rem);
  --faq-stroke: rgba(53, 230, 218, 0.55);
  padding-bottom: clamp(2.5rem, 7vw, 5rem);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding-block: clamp(1rem, 3vw, 1.75rem) 0;
}

.page-faq .faq-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--ls-font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--ls-slate);
}

.page-faq .faq-crumb li + li::before {
  content: "/";
  margin-right: 0.55rem;
  color: var(--ls-line-strong);
}

.page-faq .faq-crumb a {
  color: var(--ls-slate);
  text-decoration: none;
  transition: color var(--ls-dur) var(--ls-ease);
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  color: var(--ls-cyan);
}

/* ---------- 页头 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-block: clamp(0.5rem, 2vw, 1rem) clamp(1.75rem, 5vw, 3rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -16rem;
  right: -12rem;
  width: min(38rem, 118vw);
  height: min(38rem, 118vw);
  background: radial-gradient(circle at 50% 50%, rgba(53, 230, 218, 0.18), rgba(53, 230, 218, 0) 66%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, rgba(53, 230, 218, 0.5), rgba(255, 210, 74, 0.22) 42%, rgba(150, 160, 166, 0) 88%);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
  padding-top: clamp(1rem, 3vw, 2rem);
}

.page-faq .faq-hero__title {
  margin: 0.7rem 0 0;
  max-width: 20ch;
  font-size: clamp(2rem, 1.35rem + 3.6vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ls-cream);
}

.page-faq .faq-hero__lead {
  margin: 1.2rem 0 0;
  max-width: 58ch;
  color: var(--ls-slate);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.1rem);
  line-height: 1.75;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

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

.page-faq .faq-hero__figure .ls-figure__frame {
  overflow: hidden;
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-r-lg);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2.25rem), calc(100% - 2.25rem) 100%, 0 100%);
  background: linear-gradient(140deg, rgba(11, 20, 36, 0.96), rgba(5, 7, 14, 0.98) 62%, rgba(53, 230, 218, 0.1));
}

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

.page-faq .faq-hero__figure .ls-figure__cap {
  margin-top: 0.75rem;
  font-family: var(--ls-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ls-slate);
}

/* ---------- 分类跳转轨道 ---------- */
.page-faq .faq-jump {
  position: sticky;
  top: var(--faq-sticky-top);
  z-index: 6;
  padding-block: 0.65rem 1.1rem;
  background: linear-gradient(to bottom, var(--ls-void) 68%, rgba(5, 7, 14, 0));
}

.page-faq .faq-jump__track {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.2rem;
  scrollbar-width: none;
}

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

.page-faq .faq-jump__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.55rem 1.05rem;
  border: 1px solid var(--ls-line-strong);
  border-radius: var(--ls-pill);
  background: rgba(11, 20, 36, 0.72);
  color: var(--ls-cream);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--ls-dur) var(--ls-ease), color var(--ls-dur) var(--ls-ease), transform var(--ls-dur) var(--ls-ease);
}

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

.page-faq .faq-jump__link:focus-visible {
  outline: 2px solid var(--ls-cyan);
  outline-offset: 3px;
}

.page-faq .faq-jump__link--volt {
  border-color: rgba(255, 210, 74, 0.5);
  color: var(--ls-volt);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  border-top: 1px solid var(--ls-line);
  scroll-margin-top: calc(var(--ls-bar-h) + 5.5rem);
}

.page-faq .faq-group__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2.25rem);
  padding-block: clamp(1.9rem, 5vw, 3rem);
}

.page-faq .faq-group__idx {
  display: block;
  font-family: var(--ls-font-mono);
  font-size: clamp(2.5rem, 1.6rem + 3.6vw, 3.75rem);
  line-height: 1;
  letter-spacing: -0.04em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--faq-stroke);
}

@supports not (-webkit-text-stroke: 1px #000) {
  .page-faq .faq-group__idx {
    color: rgba(53, 230, 218, 0.4);
    -webkit-text-stroke: 0;
  }
}

.page-faq .faq-group:nth-of-type(2) .faq-group__idx {
  -webkit-text-stroke-color: rgba(79, 107, 88, 1);
}

.page-faq .faq-group:nth-of-type(3) .faq-group__idx {
  -webkit-text-stroke-color: rgba(196, 105, 63, 0.95);
}

.page-faq .faq-group:nth-of-type(4) .faq-group__idx {
  -webkit-text-stroke-color: rgba(228, 87, 127, 0.8);
}

.page-faq .faq-group__title {
  margin: 0.9rem 0 0.5rem;
  font-size: clamp(1.35rem, 1.15rem + 0.8vw, 1.85rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--ls-cream);
}

.page-faq .faq-group__note {
  margin: 0;
  max-width: 34ch;
  color: var(--ls-slate);
  font-size: 0.875rem;
  line-height: 1.7;
}

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

.page-faq .faq-group__body .faq-item:first-of-type {
  border-top: 1px solid var(--ls-line);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.1rem 0;
  list-style: none;
  cursor: pointer;
  color: var(--ls-cream);
  font-size: clamp(1rem, 0.95rem + 0.22vw, 1.1rem);
  line-height: 1.5;
  transition: color var(--ls-dur) var(--ls-ease);
}

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

.page-faq .faq-item summary::marker {
  content: "";
}

.page-faq .faq-item summary:hover,
.page-faq .faq-item summary:hover .faq-item__sign {
  color: var(--ls-cyan);
}

.page-faq .faq-item summary:hover .faq-item__sign {
  border-color: var(--ls-cyan);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--ls-cyan);
  outline-offset: 4px;
  border-radius: var(--ls-r-sm);
}

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

.page-faq .faq-item__sign {
  position: relative;
  flex: 0 0 auto;
  width: 1.6rem;
  height: 1.6rem;
  border: 1px solid var(--ls-line-strong);
  border-radius: var(--ls-pill);
  color: var(--ls-cyan);
  transition: background-color var(--ls-dur) var(--ls-ease), border-color var(--ls-dur) var(--ls-ease), color var(--ls-dur) var(--ls-ease);
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: currentColor;
  transform: translate(-50%, -50%);
  transition: transform var(--ls-dur) var(--ls-ease);
}

.page-faq .faq-item__sign::before {
  width: 0.7rem;
  height: 1px;
}

.page-faq .faq-item__sign::after {
  width: 1px;
  height: 0.7rem;
}

.page-faq .faq-item[open] .faq-item__sign {
  background: var(--ls-cyan);
  border-color: var(--ls-cyan);
  color: var(--ls-ink);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-item__answer {
  padding: 0.15rem 0 1.4rem;
}

.page-faq .faq-item__answer > p {
  margin: 0 0 0.85rem;
  max-width: 64ch;
  color: rgba(243, 237, 226, 0.86);
  font-size: 0.9375rem;
  line-height: 1.78;
}

.page-faq .faq-item__answer a {
  color: var(--ls-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 230, 218, 0.42);
  transition: border-color var(--ls-dur) var(--ls-ease);
}

.page-faq .faq-item__answer a:hover,
.page-faq .faq-item__answer a:focus-visible {
  border-bottom-color: var(--ls-cyan);
}

/* ---------- 步骤列表 ---------- */
.page-faq .faq-steps {
  counter-reset: faqstep;
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps > li {
  position: relative;
  counter-increment: faqstep;
  padding-left: 2.1rem;
  max-width: 62ch;
  color: rgba(243, 237, 226, 0.82);
  font-size: 0.9375rem;
  line-height: 1.75;
}

.page-faq .faq-steps > li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.18em;
  font-family: var(--ls-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--ls-volt);
}

.page-faq .faq-steps > li::after {
  content: "";
  position: absolute;
  left: 0.32rem;
  top: 1.5em;
  bottom: -0.65rem;
  width: 1px;
  background: linear-gradient(to bottom, rgba(150, 160, 166, 0.45), rgba(150, 160, 166, 0));
}

.page-faq .faq-steps > li:last-child::after {
  display: none;
}

/* ---------- 组内配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 1.5rem;
}

.page-faq .faq-figure .ls-figure__frame {
  overflow: hidden;
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-r-md);
  background: linear-gradient(150deg, rgba(11, 20, 36, 0.95), rgba(5, 7, 14, 0.95) 55%, rgba(196, 105, 63, 0.14));
}

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

.page-faq .faq-figure .ls-figure__cap {
  margin-top: 0.65rem;
  font-family: var(--ls-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ls-slate);
}

/* ---------- 人工支持 ---------- */
.page-faq .faq-human {
  margin-top: clamp(1rem, 3vw, 2rem);
}

.page-faq .faq-human__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  padding: clamp(1.75rem, 4vw, 2.75rem);
  border: 1px solid var(--ls-line);
  border-radius: var(--ls-r-lg);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(228, 87, 127, 0.12), rgba(228, 87, 127, 0) 56%),
    linear-gradient(155deg, rgba(11, 20, 36, 0.95), rgba(5, 7, 14, 0.96));
}

.page-faq .faq-human__title {
  margin: 0.7rem 0 0.85rem;
  font-size: clamp(1.5rem, 1.25rem + 1vw, 2.1rem);
  line-height: 1.22;
  letter-spacing: -0.012em;
  color: var(--ls-cream);
}

.page-faq .faq-human__lead {
  margin: 0 0 1.5rem;
  max-width: 52ch;
  color: var(--ls-slate);
  font-size: 0.9375rem;
  line-height: 1.78;
}

.page-faq .faq-human__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0;
}

.page-faq .faq-human__dl {
  display: grid;
  align-content: start;
  gap: 0.9rem;
  margin: 0;
}

.page-faq .faq-human__dl > div {
  display: grid;
  gap: 0.2rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px dashed var(--ls-line);
}

.page-faq .faq-human__dl > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-human__dl dt {
  font-family: var(--ls-font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--ls-slate);
}

.page-faq .faq-human__dl dd {
  margin: 0;
  color: var(--ls-cream);
  font-size: 0.9375rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-human__panel {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-group__inner {
    grid-template-columns: minmax(13rem, 0.7fr) minmax(0, 2fr);
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-faq .faq-group__rail {
    position: sticky;
    top: calc(var(--ls-bar-h) + 5rem);
    align-self: start;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    --faq-sticky-top: 0.75rem;
  }

  .page-faq .faq-group {
    scroll-margin-top: 6rem;
  }

  .page-faq .faq-group__rail {
    top: 3.5rem;
  }

  .page-faq .faq-hero::before {
    right: -6rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump__link,
  .page-faq .faq-item summary,
  .page-faq .faq-item__sign,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-crumb a,
  .page-faq .faq-item__answer a {
    transition: none;
  }

  .page-faq .faq-jump__link:hover {
    transform: none;
  }
}