.page-faq {
  --faq-index-w: 268px;
  --faq-gap: clamp(1.5rem, 3vw, 3rem);
  background: var(--c-ink);
  color: var(--c-white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: clamp(1.75rem, 4vw, 3rem) 0 clamp(2.25rem, 5vw, 4rem);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(255, 106, 26, 0.15), transparent 62%),
    linear-gradient(180deg, var(--c-ink) 0%, var(--c-ink) 68%, rgba(18, 27, 46, 0.85) 100%);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(38, 50, 74, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 50, 74, 0.5) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.16;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

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

.page-faq .breadcrumb {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  margin-bottom: 1.1rem;
}

.page-faq .faq-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 6.2vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0.55rem 0 0;
  max-width: 22ch;
}

.page-faq .faq-title__accent {
  display: inline-block;
  color: var(--c-orange);
  position: relative;
}

.page-faq .faq-title__accent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.06em;
  height: 0.09em;
  background: linear-gradient(90deg, var(--c-orange), rgba(255, 106, 26, 0));
}

.page-faq .faq-lead {
  margin: 1.15rem 0 0;
  max-width: 46ch;
  font-size: clamp(0.9375rem, 1.1vw, 1.0625rem);
  line-height: 1.8;
  color: var(--c-muted);
}

.page-faq .faq-hero__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.75rem;
  margin: 1.6rem 0 0;
  padding: 1rem 0 0;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-hero__meta-item {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--c-muted);
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__meta-item .mono {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--c-yellow);
}

.page-faq .faq-hero__visual {
  margin: 0;
  min-width: 0;
}

.page-faq .faq-hero__frame {
  position: relative;
  overflow: hidden;
  background: var(--c-panel);
  clip-path: polygon(
    var(--cut-lg) 0,
    100% 0,
    100% calc(100% - var(--cut-lg)),
    calc(100% - var(--cut-lg)) 100%,
    0 100%,
    0 var(--cut-lg)
  );
}

.page-faq .faq-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06) brightness(0.92);
}

.page-faq .faq-hero__frame-glow {
  position: absolute;
  inset: 0;
  background: linear-gradient(198deg, rgba(10, 16, 32, 0) 34%, rgba(10, 16, 32, 0.8) 100%);
  pointer-events: none;
}

.page-faq .faq-hero__visual .media-caption {
  margin-top: 0.85rem;
  font-size: 0.8125rem;
  line-height: 1.65;
  color: var(--c-muted);
}

/* ---------- 斜向断层 ---------- */

.page-faq .faq-divider {
  height: 34px;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  background: repeating-linear-gradient(
    -52deg,
    rgba(255, 106, 26, 0.16) 0 2px,
    transparent 2px 22px
  );
}

/* ---------- 主体两列 ---------- */

.page-faq .faq-body {
  padding: clamp(2rem, 4.5vw, 3.5rem) 0 clamp(1.5rem, 3vw, 2.5rem);
}

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

/* 索引 */

.page-faq .faq-index {
  min-width: 0;
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 0.75rem;
}

.page-faq .faq-index__heading {
  margin: 0 0 0.75rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.35rem;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__item {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: auto auto;
  gap: 0.6rem;
  align-items: center;
  white-space: nowrap;
  padding: 0.55rem 0.7rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--c-muted);
  text-decoration: none;
  border-bottom: 2px solid var(--c-line);
  transition:
    color var(--dur-2) var(--ease),
    border-color var(--dur-2) var(--ease),
    background var(--dur-2) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--c-white);
  border-bottom-color: var(--c-orange);
  background: rgba(255, 106, 26, 0.1);
}

.page-faq .faq-index__link:focus-visible {
  outline: 2px solid var(--c-yellow);
  outline-offset: 2px;
}

.page-faq .faq-index__num {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-orange);
}

.page-faq .faq-index__note {
  margin: 0.75rem 0 0;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--c-muted);
  opacity: 0.75;
}

/* 面板 */

.page-faq .faq-panels {
  min-width: 0;
  display: grid;
  gap: clamp(1rem, 2vw, 1.5rem);
}

.page-faq .faq-panel {
  position: relative;
  scroll-margin-top: 100px;
  padding: clamp(1.35rem, 3vw, 2rem) clamp(1rem, 2.6vw, 1.85rem);
  background: linear-gradient(180deg, rgba(18, 27, 46, 0.92), rgba(18, 27, 46, 0.55));
  border-left: 2px solid var(--c-line);
  transition:
    border-color var(--dur-3) var(--ease),
    background var(--dur-3) var(--ease);
}

.page-faq .faq-panel:target {
  border-left-color: var(--c-yellow);
  background: linear-gradient(180deg, rgba(18, 27, 46, 1), rgba(18, 27, 46, 0.68));
}

.page-faq .faq-panel__head {
  margin-bottom: 1.1rem;
}

.page-faq .faq-panel__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0.35rem 0 0.55rem;
}

.page-faq .faq-panel__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--c-muted);
}

/* 折叠条目 */

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

.page-faq .faq-summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.7rem;
  align-items: center;
  padding: 0.95rem 0;
  cursor: pointer;
  list-style: none;
  color: var(--c-white);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.6;
  transition: color var(--dur-2) var(--ease);
}

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

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

.page-faq .faq-summary:hover {
  color: var(--c-orange);
}

.page-faq .faq-summary:focus-visible {
  outline: 2px solid var(--c-yellow);
  outline-offset: 3px;
}

.page-faq .faq-summary__num {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-orange);
}

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

.page-faq .faq-caret {
  flex: none;
  color: var(--c-muted);
  transition:
    transform var(--dur-2) var(--ease),
    color var(--dur-2) var(--ease);
}

.page-faq .faq-item[open] > .faq-summary .faq-caret {
  transform: rotate(180deg);
  color: var(--c-orange);
}

.page-faq .faq-answer {
  padding: 0 0 1.15rem;
}

.page-faq .faq-steps {
  list-style: none;
  counter-reset: faq-step;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .faq-steps > li {
  counter-increment: faq-step;
  position: relative;
  padding-left: 2.4rem;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-faq .faq-steps > li::before {
  content: counter(faq-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.18rem;
  width: 1.7rem;
  height: 1.7rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--c-ink);
  background: var(--c-orange);
}

/* ---------- 联系支持 ---------- */

.page-faq .faq-escalate {
  scroll-margin-top: 100px;
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
  background: linear-gradient(180deg, rgba(18, 27, 46, 0) 0%, rgba(18, 27, 46, 0.75) 45%, var(--c-panel) 100%);
}

.page-faq .faq-escalate__media {
  margin: 0 0 clamp(1.5rem, 3vw, 2.5rem);
  height: clamp(110px, 16vw, 200px);
  overflow: hidden;
  background: var(--c-ink);
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--cut-lg) 100%, 0 calc(100% - var(--cut-lg)));
}

.page-faq .faq-escalate__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.68;
}

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

.page-faq .faq-escalate__head {
  max-width: 52ch;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.page-faq .faq-escalate__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1.1;
  letter-spacing: -0.018em;
  margin: 0.4rem 0 0.6rem;
}

.page-faq .faq-escalate__lead {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--c-muted);
}

.page-faq .faq-escalate__grid {
  display: grid;
  gap: clamp(1.25rem, 2.6vw, 2rem);
  align-items: start;
}

.page-faq .faq-support__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-faq .faq-support__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: var(--c-muted);
}

.page-faq .faq-support__list li::before {
  content: "";
  width: 9px;
  height: 9px;
  margin-top: 0.6rem;
  background: var(--c-orange);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
}

.page-faq .faq-support__card {
  padding: clamp(1.25rem, 2.6vw, 1.85rem);
  background:
    linear-gradient(180deg, rgba(255, 106, 26, 0.16), rgba(255, 106, 26, 0) 42%),
    var(--c-ink);
  border: 1px solid var(--c-line);
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
}

.page-faq .faq-support__card-title {
  margin: 0 0 1rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-orange);
}

.page-faq .faq-contact {
  list-style: none;
  margin: 0 0 1.1rem;
  padding: 0;
  display: grid;
  gap: 0.85rem;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 0.15rem;
}

.page-faq .faq-contact__key {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}

.page-faq .faq-contact__val {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--c-white);
  text-decoration: none;
  word-break: break-all;
}

.page-faq a.faq-contact__val:hover,
.page-faq a.faq-contact__val:focus-visible {
  color: var(--c-orange);
}

.page-faq .faq-support__card-note {
  margin: 0 0 1.25rem;
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--c-muted);
  padding-top: 1rem;
  border-top: 1px solid var(--c-line);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .faq-escalate__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-index {
    border-bottom: 0;
    border-left: 1px solid var(--c-line);
    padding: 0 0 0 1rem;
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index__list {
    display: grid;
    gap: 0.15rem;
    overflow: visible;
    padding-bottom: 0;
  }

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

  .page-faq .faq-index__link {
    grid-template-columns: auto 1fr;
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid var(--c-line);
    font-size: 0.875rem;
    line-height: 1.5;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--c-orange);
    border-bottom-color: transparent;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero {
    padding-top: clamp(2.5rem, 4vw, 3.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-caret,
  .page-faq .faq-index__link,
  .page-faq .faq-panel,
  .page-faq .faq-summary {
    transition: none;
  }
}