/* ===== 帮助中心 · 页面专属样式（作用域：.page-faq） ===== */

.page-faq {
  --faq-line: rgba(140, 243, 220, .14);
  --faq-line-strong: rgba(140, 243, 220, .26);
  --faq-gap: clamp(26px, 4vw, 52px);
  --faq-anchor: calc(var(--strip-h) + var(--bar-h) + 26px);
  --faq-indent: clamp(38px, 6vw, 52px);
  background: var(--ink-950);
  color: var(--chalk);
  overflow-x: hidden;
}

.page-faq p {
  margin: 0;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(42px, 7vw, 88px) 0 clamp(34px, 5vw, 62px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-faq .faq-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 32%;
  filter: saturate(.5) brightness(.48) contrast(1.1);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(95% 85% at 8% 0%, rgba(79, 227, 193, .18), transparent 62%),
    radial-gradient(70% 60% at 100% 10%, rgba(255, 90, 54, .10), transparent 60%),
    linear-gradient(180deg, rgba(6, 17, 14, .48) 0%, rgba(6, 17, 14, .9) 64%, var(--ink-950) 100%);
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: 0;
}

.page-faq .faq-hero h1 {
  margin: 16px 0 18px;
  max-width: 15em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(31px, 6.2vw, 62px);
  line-height: 1.06;
  letter-spacing: -.012em;
  text-wrap: balance;
}

.page-faq .faq-hero .lead {
  max-width: 38em;
  font-size: clamp(15px, 1.55vw, 17px);
  line-height: 1.8;
  color: var(--sage);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 13px;
  letter-spacing: .01em;
  color: var(--sage);
}

.page-faq .faq-hero__meta li {
  display: flex;
  align-items: baseline;
  gap: 7px;
}

.page-faq .faq-hero__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1em;
  letter-spacing: .02em;
  color: var(--cyan);
}

/* ---------- 主体骨架 ---------- */

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
  padding-top: clamp(32px, 5vw, 64px);
  padding-bottom: clamp(40px, 6vw, 76px);
}

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

/* ---------- 左侧问题索引 ---------- */

.page-faq .faq-index {
  position: relative;
  padding-top: 14px;
  border-top: 1px solid var(--faq-line-strong);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 22px auto;
  gap: 8px;
  align-items: baseline;
  padding: 9px 14px;
  border-left: 0;
  border-radius: var(--radius-m);
  background: var(--glass);
  color: var(--sage);
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--chalk);
  background: var(--glass-strong);
  border-left-color: var(--cyan);
  outline: none;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan);
  opacity: .85;
}

.page-faq .faq-index__note {
  margin-top: 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--sage);
}

.page-faq .faq-index__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 227, 193, .35);
}

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

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: var(--faq-anchor);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(46px, 7vw, 88px);
}

.page-faq .faq-group + .faq-group::before {
  content: "";
  display: block;
  height: 1px;
  margin-bottom: clamp(32px, 5vw, 54px);
  background: linear-gradient(90deg, rgba(79, 227, 193, .48), rgba(79, 227, 193, .10) 42%, transparent 88%);
}

.page-faq .faq-group__head {
  position: relative;
  padding-left: var(--faq-indent);
  margin-bottom: 18px;
}

.page-faq .faq-group__num {
  position: absolute;
  left: 0;
  top: -14px;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(50px, 8vw, 94px);
  line-height: .82;
  letter-spacing: -.03em;
  color: rgba(79, 227, 193, .15);
  pointer-events: none;
  user-select: none;
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 29px);
  line-height: 1.25;
  letter-spacing: .01em;
  color: var(--chalk);
}

.page-faq .faq-group__note {
  margin-top: 9px;
  max-width: 42em;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sage);
}

/* ---------- 章节配图 ---------- */

.page-faq .faq-figure {
  position: relative;
  margin: 22px 0 26px;
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--ink-850);
  border: 1px solid var(--glass-line-soft);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(.75) brightness(.78) contrast(1.06);
}

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--glass-line-soft);
  background: var(--glass);
  font-size: 13px;
  line-height: 1.65;
  color: var(--sage);
}

/* ---------- 问答列表 ---------- */

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

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

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 10px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(79, 227, 193, 0));
  opacity: 0;
  transform: scaleY(.35);
  transform-origin: top center;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-item[data-open]::before {
  opacity: 1;
  transform: scaleY(1);
}

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

.page-faq .faq-trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 18px;
  gap: 12px;
  align-items: start;
  margin: 0;
  padding: 20px 2px 20px 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.page-faq .faq-trigger:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--radius-s);
}

.page-faq .faq-num {
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .07em;
  color: var(--sage);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-text {
  font-family: var(--font-body);
  font-size: clamp(15.5px, 1.7vw, 17.5px);
  font-weight: 500;
  line-height: 1.6;
  color: var(--chalk);
  overflow-wrap: break-word;
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-trigger:hover .faq-text,
.page-faq .faq-trigger:hover .faq-num {
  color: var(--cyan-soft);
}

.page-faq .faq-item[data-open] .faq-num {
  color: var(--cyan);
}

.page-faq .faq-icon {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 6px;
  justify-self: end;
  flex: none;
}

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

.page-faq .faq-icon::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}

.page-faq .faq-icon::after {
  left: 7px;
  top: 0;
  width: 2px;
  height: 16px;
}

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

.page-faq .faq-answer {
  padding: 2px 0 26px var(--faq-indent);
}

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

@keyframes faq-rise {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-answer p {
  max-width: 34em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--sage);
  overflow-wrap: break-word;
}

.page-faq .faq-answer p + p {
  margin-top: 12px;
}

.page-faq .faq-answer a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 227, 193, .35);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

/* ---------- 状态标记小清单 ---------- */

.page-faq .faq-states {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  max-width: 34em;
}

.page-faq .faq-states > li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 14px;
  border-radius: var(--radius-m);
  border-left: 2px solid var(--glass-line);
  background: var(--glass);
}

.page-faq .faq-tag {
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--chalk);
  white-space: nowrap;
}

.page-faq .faq-states__val {
  margin-left: auto;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--flame-soft);
  white-space: nowrap;
}

/* ---------- 页尾行动区 ---------- */

.page-faq .faq-cta {
  padding-bottom: clamp(56px, 9vw, 116px);
}

.page-faq .faq-cta__inner {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4vw, 52px);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius-l);
  background:
    radial-gradient(120% 150% at 0% 0%, rgba(79, 227, 193, .17), transparent 58%),
    radial-gradient(80% 120% at 100% 100%, rgba(255, 90, 54, .12), transparent 62%),
    linear-gradient(140deg, var(--ink-900), var(--ink-850));
}

.page-faq .faq-cta__title {
  margin: 12px 0 14px;
  max-width: 20em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 38px);
  line-height: 1.16;
  letter-spacing: -.008em;
  color: var(--chalk);
}

.page-faq .faq-cta__text {
  max-width: 40em;
  font-size: 15px;
  line-height: 1.78;
  color: var(--sage);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 平板及以上 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-faq .faq-index__link {
    grid-template-columns: 26px minmax(0, 1fr);
    padding: 9px 12px;
    margin-left: -12px;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: none;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: var(--glass);
  }

  .page-faq .faq-figure {
    margin: 26px 0 30px;
  }
}

/* ---------- 桌面分栏 ---------- */

@media (min-width: 1000px) {
  .page-faq .faq-shell {
    grid-template-columns: 226px minmax(0, 1fr);
    gap: clamp(44px, 5vw, 88px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-anchor);
  }

  .page-faq .faq-index__note {
    max-width: 20em;
  }

  .page-faq .faq-answer p,
  .page-faq .faq-states {
    max-width: 36em;
  }
}

/* ---------- 窄屏微调 ---------- */

@media (max-width: 560px) {
  .page-faq {
    --faq-indent: 34px;
  }

  .page-faq .faq-trigger {
    grid-template-columns: 26px minmax(0, 1fr) 16px;
    gap: 10px;
    padding: 17px 0;
  }

  .page-faq .faq-num {
    padding-top: 4px;
  }

  .page-faq .faq-group__num {
    top: -8px;
    font-size: 46px;
  }

  .page-faq .faq-item::before {
    left: -8px;
  }

  .page-faq .faq-figure figcaption {
    font-size: 12.5px;
  }

  .page-faq .faq-cta__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

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

  .page-faq .faq-item::before,
  .page-faq .faq-icon::before,
  .page-faq .faq-icon::after {
    transition: none;
  }
}