.page-faq {
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(120% 92% at 84% 10%, rgba(43, 245, 176, 0.1), transparent 58%),
    linear-gradient(160deg, var(--moss) 0%, var(--ink) 64%);
  border-bottom: 1px solid var(--line);
  padding-block: clamp(22px, 4vw, 40px) clamp(30px, 5vw, 58px);
}

.page-faq .faq-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(36, 48, 59, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 48, 59, 0.55) 1px, transparent 1px);
  background-size: 96px 96px;
  -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 .crumbs {
  position: relative;
  z-index: 1;
  margin-bottom: clamp(20px, 3vw, 34px);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-faq .faq-hero .crumbs a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

.page-faq .faq-hero .crumbs a:hover,
.page-faq .faq-hero .crumbs a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

.page-faq .crumb-sep {
  margin: 0 8px;
  color: var(--line);
}

.page-faq .faq-hero__split {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 46px);
  align-items: center;
}

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

.page-faq .faq-hero .index-label {
  color: var(--deep);
}

.page-faq .faq-hero h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(27px, 4.4vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 12px 0 16px;
  max-width: 18em;
}

.page-faq .faq-hero .lead {
  color: var(--muted);
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.82;
  max-width: 36em;
  margin: 0;
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 24px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
}

.page-faq .faq-hero__meta li {
  display: flex;
  align-items: baseline;
  gap: 7px;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.page-faq .faq-hero__meta .mono {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-faq .faq-hero__figure {
  position: relative;
  margin: 0;
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 26px 100%, 0 calc(100% - 26px));
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}

.page-faq .faq-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(43, 245, 176, 0.12), transparent 56%);
  pointer-events: none;
}

/* ---------- 两栏主体 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  padding-block: clamp(32px, 5vw, 64px) clamp(48px, 7vw, 96px);
}

/* 左栏主题目录 */
.page-faq .faq-toc {
  border-left: 1px solid var(--line);
  padding-left: 16px;
  min-width: 0;
}

.page-faq .faq-toc__title {
  margin: 0 0 12px;
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-faq .faq-toc__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 10px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-toc__list a:hover,
.page-faq .faq-toc__list a:focus-visible {
  color: var(--paper);
  border-left-color: var(--neon);
  background: rgba(43, 245, 176, 0.05);
  outline: none;
}

.page-faq .faq-toc__list .mono {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--deep);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-toc__list a:hover .mono {
  color: var(--neon);
}

/* 右栏问答 */
.page-faq .faq-body {
  display: grid;
  gap: clamp(34px, 5vw, 60px);
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: 92px;
  min-width: 0;
}

.page-faq .faq-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 24px);
  align-items: start;
  margin-bottom: clamp(16px, 2.4vw, 24px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-section__num {
  font-family: var(--mono);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--deep);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-section h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(19px, 2.3vw, 25px);
  line-height: 1.3;
  letter-spacing: -0.005em;
  color: var(--paper);
  margin: 0 0 7px;
}

.page-faq .faq-section__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 42em;
}

/* ---------- 手风琴 ---------- */
.page-faq .accordion {
  display: grid;
  gap: 8px;
}

.page-faq .accordion__item {
  position: relative;
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: background var(--dur) var(--ease);
}

.page-faq .accordion__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--line);
  transition: background var(--dur) var(--ease);
  z-index: 1;
}

.page-faq .accordion__item:hover::before {
  background: var(--deep);
}

.page-faq .accordion__item:has(.accordion__btn[aria-expanded="true"]) {
  background:
    linear-gradient(180deg, rgba(43, 245, 176, 0.06), transparent 72%),
    var(--panel);
}

.page-faq .accordion__item:has(.accordion__btn[aria-expanded="true"])::before {
  background: var(--neon);
}

.page-faq .accordion__btn {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  margin: 0;
  padding: 15px 18px 15px 20px;
  background: transparent;
  border: 0;
  text-align: left;
  color: var(--paper);
  font-family: var(--sans);
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.65;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-faq .accordion__btn:hover {
  color: var(--neon);
}

.page-faq .accordion__btn:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -3px;
}

.page-faq .accordion__btn::after {
  content: "";
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  margin-top: 8px;
  border-right: 2px solid var(--deep);
  border-bottom: 2px solid var(--deep);
  transform: rotate(45deg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .accordion__btn[aria-expanded="true"]::after {
  transform: rotate(-135deg);
  border-color: var(--neon);
}

.page-faq .accordion__panel {
  display: none;
  padding: 0 20px 19px 20px;
}

.page-faq .accordion__panel[data-open]:not([data-open="false"]) {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .accordion__panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 40em;
}

.page-faq .faq-link {
  display: inline-block;
  justify-self: start;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--deep);
  text-decoration: none;
  border-top: 1px solid var(--line);
  padding-top: 8px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--neon);
  border-top-color: var(--neon);
  outline: none;
}

.page-faq .faq-tag {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  line-height: 1.7;
  color: var(--amber);
  background: rgba(255, 138, 61, 0.12);
  border: 1px solid rgba(255, 138, 61, 0.42);
  vertical-align: middle;
  white-space: nowrap;
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: clamp(20px, 3vw, 30px);
  background:
    linear-gradient(145deg, rgba(43, 245, 176, 0.07), transparent 62%),
    var(--panel);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-faq .faq-contact .index-label {
  display: block;
  color: var(--deep);
  margin: 0 0 6px;
}

.page-faq .faq-contact__val {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: clamp(15px, 2.1vw, 19px);
  line-height: 1.5;
  color: var(--paper);
  letter-spacing: 0.01em;
  word-break: break-all;
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 34em;
}

.page-faq .copy-btn[data-copied] {
  background: var(--deep);
  border-color: var(--deep);
  color: var(--ink);
}

.page-faq .faq-contact__foot {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
}

.page-faq .faq-contact__foot a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .faq-contact__foot a:hover,
.page-faq .faq-contact__foot a:focus-visible {
  color: var(--neon);
  border-bottom-color: var(--neon);
}

/* ---------- 底部引导 ---------- */
.page-faq .faq-tail {
  border-top: 1px solid var(--line);
  background: linear-gradient(200deg, var(--ink) 0%, var(--moss) 100%);
  padding-block: clamp(40px, 6vw, 80px);
}

.page-faq .faq-tail__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}

.page-faq .faq-tail__figure {
  margin: 0;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-faq .faq-tail__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.8) brightness(0.9);
}

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

.page-faq .faq-tail h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.32;
  color: var(--paper);
  margin: 0 0 12px;
}

.page-faq .faq-tail p {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.82;
  max-width: 40em;
}

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 999px) {
  .page-faq .faq-toc {
    border-left: 0;
    padding-left: 0;
  }

  .page-faq .faq-toc__list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    gap: 8px;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .page-faq .faq-toc__list a {
    border-left: 0;
    border: 1px solid var(--line);
    padding: 8px 12px;
    white-space: nowrap;
  }

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

@media (min-width: 860px) {
  .page-faq .accordion__panel[data-open]:not([data-open="false"]) {
    grid-template-columns: minmax(0, 1fr) 152px;
    gap: 26px;
    align-items: start;
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 30px;
  }

  .page-faq .faq-contact__side {
    border-left: 1px solid var(--line);
    padding-left: 30px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__split {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: clamp(34px, 5vw, 72px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
    align-self: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-tail__inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .accordion__item,
  .page-faq .accordion__item::before,
  .page-faq .accordion__btn,
  .page-faq .accordion__btn::after,
  .page-faq .faq-toc__list a,
  .page-faq .faq-link {
    transition: none;
  }
}