.page-faq {
  --faq-rule: rgba(108, 133, 152, .24);
  --faq-rule-strong: rgba(108, 133, 152, .48);
  --faq-tint: rgba(61, 255, 158, .12);
  --faq-card: linear-gradient(160deg, rgba(15, 42, 68, .88), rgba(8, 23, 38, .94));
  background: var(--night);
  color: var(--white);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(2rem, 6vw, 4.25rem) 0 clamp(1.75rem, 4vw, 3rem);
  background:
    radial-gradient(120% 100% at 85% -10%, rgba(53, 214, 255, .18), transparent 58%),
    radial-gradient(90% 90% at 5% 110%, rgba(255, 106, 26, .16), transparent 62%),
    linear-gradient(180deg, var(--night-2) 0%, var(--night) 74%);
  border-bottom: 1px solid var(--faq-rule);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -20%;
  width: min(48vw, 430px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(140deg, rgba(61, 255, 158, .2), rgba(61, 255, 158, 0) 68%);
  clip-path: polygon(46% 0, 100% 32%, 72% 100%, 0 66%);
  pointer-events: none;
}

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

.page-faq .faq-hero__coord {
  display: block;
  writing-mode: horizontal-tb;
  margin: .9rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-13);
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: .6rem 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 6vw, 3.4rem);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-faq .faq-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 40ch;
  font-size: var(--fs-15);
  line-height: 1.85;
  color: var(--steel);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: .75rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__stats .stat {
  display: grid;
  gap: .25rem;
  padding: .85rem 1rem;
  background: var(--panel);
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius-sm);
}

.page-faq .faq-hero__stats .stat__value {
  font-family: var(--font-display);
  font-size: var(--fs-28);
  line-height: 1;
  color: var(--neon);
  letter-spacing: .01em;
}

.page-faq .faq-hero__stats .stat__label {
  font-size: var(--fs-13);
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-browse {
  padding-top: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-browse__head {
  max-width: 46ch;
}

.page-faq .faq-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.4rem;
}

.page-faq .faq-chips .chip {
  font-family: var(--font-body);
  font-size: var(--fs-13);
  line-height: 1.4;
  padding: .42rem .9rem;
  border: 1px solid var(--faq-rule-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--steel);
  cursor: pointer;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

.page-faq .faq-chips .chip:hover,
.page-faq .faq-chips .chip:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
  outline: none;
}

.page-faq .faq-chips .chip.is-shown,
.page-faq .faq-chips .chip[aria-pressed="true"] {
  color: var(--night);
  background: var(--neon);
  border-color: var(--neon);
}

.page-faq .faq-status {
  margin: .85rem 0 0;
  font-family: var(--font-display);
  font-size: var(--fs-13);
  letter-spacing: .12em;
  color: var(--steel);
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-frame {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .faq-index {
  position: relative;
}

.page-faq .faq-index__title {
  margin: 0 0 .7rem;
  font-family: var(--font-display);
  font-size: var(--fs-13);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-faq .faq-index__list {
  display: flex;
  gap: .4rem;
  margin: 0;
  padding: 0 0 .35rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: .45rem;
  padding: .45rem .75rem;
  border: 1px solid var(--faq-rule);
  border-radius: 999px;
  color: var(--steel);
  font-size: var(--fs-13);
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  transition: color .25s var(--ease), border-color .25s var(--ease), background .25s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--neon);
  border-color: rgba(61, 255, 158, .55);
  background: var(--faq-tint);
  outline: none;
}

.page-faq .faq-index__num {
  font-family: var(--font-display);
  letter-spacing: .06em;
  color: var(--cyan);
}

/* ---------- 问题分组 ---------- */
.page-faq .qa-group {
  padding-top: 1.4rem;
  border-top: 1px solid var(--faq-rule);
  scroll-margin-top: calc(var(--bar-h) + 1.5rem);
}

.page-faq .qa-group + .qa-group {
  margin-top: clamp(2rem, 5vw, 3rem);
}

.page-faq .qa-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5rem .8rem;
  margin-bottom: 1rem;
}

.page-faq .qa-group__num {
  font-family: var(--font-display);
  font-size: var(--fs-28);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-faq .qa-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.8vw, 1.5rem);
  letter-spacing: .01em;
  color: var(--white);
}

.page-faq .qa-group__coord {
  margin-left: auto;
  font-family: var(--font-display);
  font-size: var(--fs-13);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--steel);
}

/* ---------- 问答卡 ---------- */
.page-faq .qa {
  position: relative;
  margin-top: .85rem;
  background: var(--faq-card);
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-faq .qa::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 34px;
  height: 34px;
  background: linear-gradient(225deg, rgba(61, 255, 158, .22), rgba(61, 255, 158, 0) 72%);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  pointer-events: none;
}

.page-faq .qa:hover {
  border-color: var(--faq-rule-strong);
}

.page-faq .qa[open] {
  border-color: rgba(61, 255, 158, .42);
  box-shadow: inset 3px 0 0 var(--neon);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: 1rem 1.05rem;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-18);
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
}

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

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

.page-faq .qa__num {
  flex: 0 0 auto;
  padding-top: .28rem;
  font-family: var(--font-display);
  font-size: var(--fs-13);
  letter-spacing: .1em;
  color: var(--ember);
}

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

.page-faq .qa__sign {
  position: relative;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  margin-top: .5rem;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--neon);
  border-radius: 2px;
}

.page-faq .qa__sign::before {
  top: 6px;
  left: 0;
  width: 14px;
  height: 2px;
}

.page-faq .qa__sign::after {
  top: 0;
  left: 6px;
  width: 2px;
  height: 14px;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}

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

.page-faq .qa__body {
  padding: .2rem 1.05rem 1.2rem;
}

.page-faq .qa__steps {
  counter-reset: faqstep;
  display: grid;
  gap: .6rem;
  margin: .55rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .qa__steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 1.7rem minmax(0, 1fr);
  gap: .6rem;
  font-size: var(--fs-15);
  line-height: 1.75;
  color: var(--white);
}

.page-faq .qa__steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: var(--fs-13);
  line-height: 1.95;
  letter-spacing: .05em;
  color: var(--neon);
}

.page-faq .qa__steps a,
.page-faq .qa__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__note {
  margin: 1rem 0 0;
  padding-left: .85rem;
  border-left: 2px solid rgba(53, 214, 255, .42);
  font-size: var(--fs-13);
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 配图 ---------- */
.page-faq .faq-shot {
  margin: 1.25rem 0 0;
  background: var(--night-2);
  border: 1px solid var(--faq-rule);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-faq .faq-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-shot figcaption {
  padding: .7rem .95rem;
  border-top: 1px solid var(--faq-rule);
  font-size: var(--fs-13);
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 联系引导 ---------- */
.page-faq .faq-help-section {
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  padding: clamp(1.5rem, 4.5vw, 2.75rem);
  background: var(--cream);
  color: var(--ink-brown);
  border-radius: var(--radius);
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -80px;
  width: 240px;
  height: 240px;
  background: linear-gradient(140deg, rgba(255, 106, 26, .3), rgba(255, 106, 26, 0) 70%);
  clip-path: polygon(40% 0, 100% 30%, 70% 100%, 0 68%);
  pointer-events: none;
}

.page-faq .faq-help h2 {
  position: relative;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.8vw, 2rem);
  letter-spacing: .01em;
  color: var(--ink-brown);
}

.page-faq .faq-help p {
  position: relative;
  margin: .85rem 0 0;
  max-width: 44ch;
  font-size: var(--fs-15);
  line-height: 1.8;
  color: var(--ink-brown);
}

.page-faq .faq-help__list {
  position: relative;
  display: grid;
  gap: .6rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  display: grid;
  gap: .2rem;
  padding: .85rem .95rem;
  background: rgba(28, 22, 19, .07);
  border-left: 3px solid var(--ember);
  border-radius: 4px;
  font-size: var(--fs-13);
  line-height: 1.7;
}

.page-faq .faq-help__list span {
  font-family: var(--font-display);
  font-size: var(--fs-13);
  letter-spacing: .16em;
  color: var(--ember);
}

.page-faq .faq-help__note {
  font-size: var(--fs-13);
  color: rgba(28, 22, 19, .74);
}

.page-faq .faq-help__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.4rem;
}

.page-faq .faq-help__actions .btn {
  text-decoration: none;
}

.page-faq .faq-help__actions .btn--ghost {
  color: var(--ink-brown);
  border-color: rgba(28, 22, 19, .38);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-faq .faq-help__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-frame {
    grid-template-columns: minmax(190px, 234px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 1.25rem);
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--faq-rule);
  }

  .page-faq .faq-index__list li + li {
    margin-top: .1rem;
  }

  .page-faq .faq-index__list a {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    margin-left: -1px;
    padding: .55rem .85rem;
    white-space: normal;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    border-left-color: var(--neon);
    background: var(--faq-tint);
  }

  .page-faq .qa-group__title {
    font-size: 1.55rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__sign::after,
  .page-faq .faq-chips .chip,
  .page-faq .faq-index__list a {
    transition: none;
  }
}