.page-faq {
  --faq-card-gap: clamp(1rem, 2.4vw, 1.5rem);
  background: var(--paper);
  color: var(--carbon);
}

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding-top: calc(var(--header-h) + 1.75rem);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: var(--track-label);
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .breadcrumb a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding-block: clamp(2rem, 4vw, 3.5rem) clamp(2.5rem, 6vw, 5rem);
  overflow: hidden;
}

.page-faq .faq-hero::before,
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero::before {
  top: -35%;
  right: -28%;
  width: min(72vw, 780px);
  aspect-ratio: 1;
  border: 1px solid var(--line-light);
}

.page-faq .faq-hero::after {
  top: -18%;
  right: -12%;
  width: min(48vw, 520px);
  aspect-ratio: 1;
  border: 1px dashed rgba(34, 211, 238, .38);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.page-faq .faq-hero__copy h1 {
  margin: .75rem 0 1.5rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--fs-76);
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-faq .faq-hero__lead {
  max-width: 34em;
  font-size: var(--fs-18);
  line-height: var(--lh-body);
  color: var(--slate);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 2rem;
  margin: 2rem 0 0;
  padding: 1.25rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line-light);
  font-size: var(--fs-14);
  color: var(--slate);
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: .6rem;
}

.page-faq .faq-hero__meta .meta--time {
  color: var(--ink);
  font-weight: 700;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--ink);
  box-shadow: 0 28px 60px -40px rgba(11, 27, 51, .7);
}

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

/* ---------- 四类入口 ---------- */

.page-faq .faq-types {
  padding-block: clamp(2.25rem, 5vw, 4rem);
}

.page-faq .faq-types__head {
  max-width: 40em;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.page-faq .faq-types__head h2 {
  margin: 0 0 .75rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-44);
  line-height: 1.15;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-faq .faq-types__head p {
  font-size: var(--fs-18);
  line-height: var(--lh-body);
  color: var(--slate);
}

.page-faq .faq-types__grid {
  display: grid;
  gap: var(--faq-card-gap);
}

.page-faq .faq-type {
  --accent: var(--cyan);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .6rem;
  min-height: 200px;
  padding: 1.5rem 1.5rem 3.25rem;
  border-radius: var(--radius-m);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  border-top: 3px solid var(--accent);
  overflow: hidden;
  transition: transform .32s var(--ease), background-color .32s var(--ease);
}

.page-faq .faq-type::after {
  content: "";
  position: absolute;
  top: -55%;
  right: -30%;
  width: 78%;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid var(--accent);
  opacity: .35;
  transition: transform .42s var(--ease), opacity .32s var(--ease);
}

.page-faq .faq-type--cyan { --accent: var(--cyan); }
.page-faq .faq-type--sand { --accent: var(--sand); }
.page-faq .faq-type--tide { --accent: var(--tide); }
.page-faq .faq-type--echo { --accent: var(--echo); }

.page-faq .faq-type:hover,
.page-faq .faq-type:focus-visible {
  transform: translateY(-4px);
  background: var(--ink-2);
}

.page-faq .faq-type:hover::after,
.page-faq .faq-type:focus-visible::after {
  transform: scale(1.12);
  opacity: .6;
}

.page-faq .faq-type__index {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: var(--track-label);
  color: var(--accent);
}

.page-faq .faq-type__name {
  font-family: var(--font-display);
  font-size: var(--fs-28);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.25;
}

.page-faq .faq-type__desc {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: rgba(247, 245, 241, .72);
}

.page-faq .faq-type__arrow {
  position: absolute;
  left: 1.5rem;
  bottom: 1.25rem;
  font-size: var(--fs-18);
  color: var(--accent);
}

/* ---------- 问答组 ---------- */

.page-faq .faq-groups {
  display: grid;
  gap: clamp(3rem, 7vw, 5.5rem);
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.page-faq .qa-group {
  --accent: var(--cyan);
  scroll-margin-top: calc(var(--header-h) + 2rem);
}

.page-faq .qa-group--cyan { --accent: var(--cyan); }
.page-faq .qa-group--sand { --accent: var(--sand); }
.page-faq .qa-group--tide { --accent: var(--tide); }
.page-faq .qa-group--echo { --accent: var(--echo); }

.page-faq .qa-group__head {
  padding: 0 0 1.25rem 1.125rem;
  margin-bottom: .5rem;
  border-left: 3px solid var(--accent);
  transition: background-color .32s var(--ease);
}

.page-faq .qa-group:target .qa-group__head {
  background: var(--paper-dim);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
  padding-right: 1.125rem;
}

.page-faq .qa-group__head h2 {
  margin: .5rem 0 .625rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.4vw, 2.25rem);
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--ink);
}

.page-faq .qa-group__head p:last-child {
  max-width: 42em;
  font-size: var(--fs-14);
  line-height: var(--lh-body);
  color: var(--slate);
}

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

.page-faq .qa-item > summary {
  display: grid;
  grid-template-columns: 2.25rem 1fr 1.125rem;
  gap: 0 .875rem;
  align-items: start;
  padding: 1.125rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
  transition: color .25s var(--ease);
}

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

.page-faq .qa-item > summary:hover,
.page-faq .qa-item > summary:focus-visible {
  color: var(--accent);
}

.page-faq .qa-item__num {
  padding-top: .25rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 500;
  letter-spacing: var(--track-label);
  color: var(--accent);
}

.page-faq .qa-item__sign {
  position: relative;
  width: 1.125rem;
  height: 1.125rem;
  margin-top: .45rem;
  flex: none;
}

.page-faq .qa-item__sign::before,
.page-faq .qa-item__sign::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--accent);
  transform: translateY(-1px);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}

.page-faq .qa-item__sign::after {
  transform: translateY(-1px) rotate(90deg);
}

.page-faq .qa-item[open] .qa-item__sign::after {
  transform: translateY(-1px) rotate(0deg);
  opacity: 0;
}

.page-faq .qa-item__body {
  padding: 0 0 1.5rem 3.125rem;
}

.page-faq .qa-item__body p {
  max-width: 38em;
  font-size: var(--fs-14);
  line-height: var(--lh-body);
  color: var(--slate);
}

.page-faq .qa-steps {
  counter-reset: step;
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: .625rem;
}

.page-faq .qa-steps > li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: .625rem;
  font-size: var(--fs-14);
  line-height: var(--lh-body);
  color: var(--carbon);
}

.page-faq .qa-steps > li::before {
  content: "0" counter(step);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--accent);
  padding-top: .18rem;
}

/* ---------- 求助通道 ---------- */

.page-faq .faq-help {
  position: relative;
  padding-block: clamp(3rem, 7vw, 5.5rem);
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  left: -18%;
  bottom: -55%;
  width: min(80vw, 760px);
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid rgba(232, 178, 74, .28);
  pointer-events: none;
}

.page-faq .faq-help__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.page-faq .faq-help__copy h2 {
  margin: 1rem 0 1.25rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-help__copy > p {
  max-width: 36em;
  font-size: var(--fs-18);
  line-height: var(--lh-body);
  color: rgba(247, 245, 241, .82);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .875rem;
  margin-top: 2rem;
}

.page-faq .faq-help__note {
  max-width: 36em;
  margin-top: 1.75rem;
  font-size: var(--fs-14);
  line-height: var(--lh-body);
  color: rgba(247, 245, 241, .66);
}

.page-faq .faq-help__note a {
  color: var(--sand);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 178, 74, .45);
}

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

.page-faq .faq-help__figure {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--line-dark);
}

.page-faq .faq-help__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 12 / 7;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-types__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }

  .page-faq .faq-types__head {
    margin-bottom: 2.25rem;
  }
}

@media (min-width: 1080px) {
  .page-faq .faq-types__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-groups {
    gap: clamp(4rem, 8vw, 6.5rem);
  }
}

@media (max-width: 520px) {
  .page-faq .faq-item > summary {
    grid-template-columns: 1.75rem 1fr 1.125rem;
    font-size: 1rem;
  }

  .page-faq .qa-item__body {
    padding-left: 2.625rem;
  }

  .page-faq .qa-steps > li {
    grid-template-columns: 1.75rem 1fr;
  }
}

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

  .page-faq .faq-type:hover,
  .page-faq .faq-type:focus-visible {
    transform: none;
  }
}