.page-faq {
  --faq-rule: rgba(30, 58, 102, 0.55);
  --faq-rule-soft: rgba(30, 58, 102, 0.32);
  --faq-panel: rgba(10, 22, 48, 0.74);
  --faq-grid-line: rgba(30, 58, 102, 0.42);
  position: relative;
  color: var(--paper);
  font-family: var(--sans);
  line-height: 1.7;
  background:
    radial-gradient(1200px 420px at 82% -10%, rgba(34, 211, 238, 0.10), transparent 70%),
    radial-gradient(900px 380px at 4% 6%, rgba(255, 90, 31, 0.09), transparent 72%),
    linear-gradient(180deg, var(--blue-900) 0%, var(--blue-800) 44%, var(--blue-900) 100%);
  overflow-x: hidden;
}

.page-faq a {
  color: inherit;
}

.page-faq a:focus-visible,
.page-faq button:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-crumb-sep {
  color: var(--line);
  padding: 0 0.45rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.4rem, 3.4vw, 2.6rem) 0 clamp(1.8rem, 4.5vw, 3.2rem);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--faq-grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--faq-grid-line) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 88%);
  pointer-events: none;
}

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

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.3rem, 3vw, 2.4rem);
  margin-top: clamp(1rem, 2.4vw, 1.8rem);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 0.7rem;
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0 0 0.9rem;
  font-size: clamp(1.95rem, 5.4vw, 3.3rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-quick {
  list-style: none;
  margin: 1.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .faq-quick__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: center;
  padding: 0.68rem 0.85rem;
  border: 1px solid var(--faq-rule);
  background: rgba(18, 38, 77, 0.45);
  text-decoration: none;
  font-size: 0.88rem;
  color: var(--paper);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-faq .faq-quick__link:hover {
  border-color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
  transform: translateX(2px);
}

.page-faq .faq-quick__k {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  font-size: 0.68rem;
  color: var(--ink);
  background: var(--orange);
  letter-spacing: 0.04em;
}

.page-faq .faq-quick__t {
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-faq .faq-hero__figure {
  margin: 0;
  padding: 0.5rem;
  border: 1px solid var(--faq-rule);
  background: rgba(5, 11, 26, 0.62);
  box-shadow: 10px 10px 0 -4px rgba(34, 211, 238, 0.16);
}

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

.page-faq .faq-hero__cap {
  display: block;
  margin-top: 0.5rem;
  padding-left: 0.15rem;
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: clamp(1.6rem, 4vw, 3rem) 0 clamp(2.4rem, 6vw, 4.5rem);
}

.page-faq .faq-layout {
  display: grid;
  gap: 1.4rem;
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-index {
  display: none;
}

.page-faq .faq-index__head {
  margin: 0 0 0.8rem;
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 3px auto minmax(0, 1fr);
  gap: 0.55rem;
  align-items: center;
  padding: 0.52rem 0.2rem;
  font-size: 0.82rem;
  text-decoration: none;
  color: var(--mist);
  transition: color 0.18s var(--ease);
}

.page-faq .faq-index__link:hover {
  color: var(--paper);
}

.page-faq .faq-index__mark {
  width: 3px;
  height: 15px;
  background: var(--orange);
  opacity: 0.4;
  transition: opacity 0.18s var(--ease), height 0.18s var(--ease);
}

.page-faq .faq-index__link:hover .faq-index__mark {
  opacity: 1;
  height: 21px;
}

.page-faq .faq-index__list > li:nth-child(1) .faq-index__mark { background: var(--orange); }
.page-faq .faq-index__list > li:nth-child(2) .faq-index__mark { background: var(--cyan); }
.page-faq .faq-index__list > li:nth-child(3) .faq-index__mark { background: var(--orange-soft); }
.page-faq .faq-index__list > li:nth-child(4) .faq-index__mark { background: var(--green); }
.page-faq .faq-index__list > li:nth-child(5) .faq-index__mark { background: var(--orange); }
.page-faq .faq-index__list > li:nth-child(6) .faq-index__mark { background: var(--cyan); }

.page-faq .faq-index__n {
  font-size: 0.68rem;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-faq .faq-index__t {
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-faq .faq-index__foot {
  margin: 1.1rem 0 0;
  padding-top: 0.85rem;
  border-top: 1px solid var(--faq-rule-soft);
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-index__foot a {
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 138, 76, 0.45);
}

/* ---------- 工具条 ---------- */
.page-faq .faq-toolbar {
  display: grid;
  gap: 0.7rem;
  padding: 0 0 1rem;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-toolbar__label {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-faq .faq-toolbar__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.page-faq .faq-chip {
  appearance: none;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.8rem;
  line-height: 1.2;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--faq-rule);
  border-radius: 0;
  background: rgba(18, 38, 77, 0.5);
  color: var(--mist);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-faq .faq-chip:hover {
  color: var(--paper);
  border-color: var(--cyan);
}

.page-faq .faq-chip[aria-pressed="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  margin-top: 1.6rem;
  padding: clamp(0.95rem, 2.2vw, 1.4rem);
  border: 1px solid var(--faq-rule);
  background: linear-gradient(180deg, rgba(18, 38, 77, 0.72), var(--faq-panel));
  box-shadow: 8px 8px 0 -3px rgba(30, 58, 102, 0.55);
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--faq-rule);
}

.page-faq .faq-group__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.42rem;
  font-size: 0.86rem;
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--orange);
  border: 1px solid rgba(255, 90, 31, 0.55);
}

.page-faq .faq-group__title {
  margin: 0 0 0.28rem;
  font-size: clamp(1.02rem, 2.2vw, 1.18rem);
  line-height: 1.35;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--mist);
}

.page-faq .faq-list {
  display: grid;
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-rule-soft);
}

.page-faq .faq-item:last-child {
  border-bottom: 0;
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.7rem;
  align-items: baseline;
  padding: 0.9rem 0.1rem;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item__id {
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 0.22rem;
  white-space: nowrap;
}

.page-faq .faq-item__q {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--paper);
  overflow-wrap: anywhere;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-item > summary:hover .faq-item__q {
  color: var(--cyan);
}

.page-faq .faq-item__sign {
  position: relative;
  width: 16px;
  height: 16px;
  align-self: center;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1.5px;
  margin-top: -0.75px;
  background: var(--orange-soft);
  transition: transform 0.22s var(--ease);
}

.page-faq .faq-item__sign::after {
  transform: rotate(90deg);
}

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

.page-faq .faq-item__a {
  margin: 0 0 1rem 0.2rem;
  padding: 0.1rem 0 0.15rem 0.95rem;
  border-left: 2px solid var(--cyan);
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.page-faq .faq-item__a p {
  margin: 0 0 0.65rem;
}

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

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.4);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0.4rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.42rem;
  counter-reset: faqstep;
}

.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 1.55rem minmax(0, 1fr);
  gap: 0.5rem;
  align-items: start;
  font-size: 0.86rem;
  line-height: 1.7;
}

.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 0.68rem;
  line-height: 1;
  padding-top: 0.32rem;
  color: var(--orange);
  letter-spacing: 0.04em;
}

.page-faq .faq-mail {
  color: var(--cyan);
  font-size: 0.84rem;
  overflow-wrap: anywhere;
}

.page-faq .faq-copyline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  margin-top: 0.75rem;
}

.page-faq .faq-copy {
  appearance: none;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 0.76rem;
  line-height: 1.2;
  padding: 0.42rem 0.7rem;
  border: 1px solid var(--faq-rule);
  border-radius: 0;
  background: rgba(5, 11, 26, 0.6);
  color: var(--paper);
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-copy:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-faq .faq-copy[data-copied="true"] {
  border-color: var(--green);
  color: var(--green);
}

.page-faq .faq-copylink {
  font-size: 0.76rem;
  color: var(--orange-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 138, 76, 0.45);
}

/* ---------- 组内配图 ---------- */
.page-faq .faq-media {
  margin: 1.1rem 0 0;
  padding: 0.5rem;
  border: 1px solid var(--faq-rule-soft);
  background: rgba(5, 11, 26, 0.55);
}

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

.page-faq .faq-media__cap {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  display: grid;
  gap: 1rem;
  margin-top: 1.8rem;
  padding: clamp(1.1rem, 3vw, 1.7rem);
  border: 1px solid rgba(255, 90, 31, 0.45);
  background:
    linear-gradient(120deg, rgba(255, 90, 31, 0.14), transparent 62%),
    rgba(18, 38, 77, 0.6);
}

.page-faq .faq-cta__title {
  margin: 0 0 0.4rem;
  font-size: clamp(1.05rem, 2.6vw, 1.34rem);
  line-height: 1.4;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-cta p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__figure {
    padding: 0.65rem;
  }

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

  .page-faq .faq-quick__link {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.4rem;
    align-content: start;
    padding: 0.8rem;
  }

  .page-faq .faq-media {
    max-width: 560px;
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(1.6rem, 3vw, 2.8rem);
    align-items: start;
  }

  .page-faq .faq-index {
    display: block;
    position: sticky;
    top: 96px;
    padding-right: 1rem;
    border-right: 1px solid var(--faq-rule-soft);
  }

  .page-faq .faq-toolbar {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: 1rem;
  }

  .page-faq .faq-item__a {
    padding-left: 1.15rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__link,
  .page-faq .faq-chip,
  .page-faq .faq-index__mark,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }

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