.page-faq {
  --faq-index-w: 268px;
  --faq-pad-x: clamp(0px, 2vw, 0px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(24px, 4vw, 40px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  left: -12%;
  width: 70%;
  height: 150%;
  background: radial-gradient(closest-side, rgba(56, 242, 208, 0.13), transparent 72%);
  transform: rotate(-8deg);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 46px);
  align-items: center;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(40px, 9vw, 78px);
  line-height: 0.94;
  letter-spacing: -0.025em;
  margin: 8px 0 0;
}

.page-faq .faq-hero h1::after {
  content: "";
  display: block;
  width: 96px;
  height: 6px;
  margin-top: 16px;
  background: linear-gradient(90deg, var(--gold), var(--signal));
  transform: skewX(-20deg);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 46ch;
  color: var(--muted);
}

.page-faq .faq-hero__media {
  margin: 0;
  position: relative;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  filter: saturate(1.05) contrast(1.02);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  right: -10px;
  bottom: -10px;
  width: 46%;
  height: 6px;
  background: var(--cyan);
  opacity: 0.55;
  transform: skewX(-20deg);
}

/* ---------- 入口速查条 ---------- */
.page-faq .faq-quick {
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(18px, 3vw, 28px) 0 clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 48, 42, 0.92), rgba(11, 31, 26, 0.6));
}

.page-faq .faq-quick__title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 16px;
}

.page-faq .faq-quick__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-faq .faq-quick__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  height: 100%;
  padding: 14px 16px;
  text-decoration: none;
  color: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.page-faq .faq-quick__item:hover,
.page-faq .faq-quick__item:focus-visible {
  border-color: var(--cyan);
  background: var(--glass-strong);
}

.page-faq .faq-quick__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-quick__code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-quick__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.page-faq .faq-quick__desc {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  margin-top: clamp(30px, 5vw, 56px);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-index .toc__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px;
}

.page-faq .faq-index .toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index .toc__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 12px;
  white-space: nowrap;
  font-size: 13px;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .faq-index .toc__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--line-soft);
}

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

.page-faq .faq-index .toc__link[aria-current="true"] {
  color: var(--paper);
  border-bottom-color: var(--cyan);
  background: linear-gradient(180deg, transparent, rgba(56, 242, 208, 0.12));
}

.page-faq .faq-index .toc__link[aria-current="true"] .toc__num {
  color: var(--cyan);
}

/* 分组 */
.page-faq .faq-group + .faq-group,
.page-faq .faq-group + .faq-contact {
  margin-top: clamp(34px, 5vw, 56px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 3.2vw, 26px);
  letter-spacing: -0.015em;
  line-height: 1.2;
}

.page-faq .faq-group__title::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  background: var(--gold);
  transform: skewX(-16deg);
}

.page-faq .faq-group__meta {
  flex: none;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-group__intro {
  margin: 14px 0 4px;
  padding-left: 14px;
  border-left: 2px solid var(--line-soft);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 62ch;
}

/* 单条问答 */
.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 15px 42px 15px 2px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
  transition: color 0.18s ease;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.4;
  color: var(--cyan);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
}

.page-faq .faq-item summary:hover {
  color: var(--gold);
}

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

.page-faq .faq-item[open] {
  background: linear-gradient(180deg, rgba(18, 48, 42, 0.5), transparent 85%);
}

.page-faq .faq-item__a {
  padding: 0 42px 16px 2px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

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

.page-faq .faq-item__a strong {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 208, 0.35);
}

.page-faq .faq-item__a a:hover {
  border-bottom-color: var(--cyan);
}

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-open 0.26s ease-out;
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-contact__panel {
  margin-top: 18px;
  display: grid;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, var(--panel), var(--panel-2) 140%);
  overflow: hidden;
}

.page-faq .faq-contact__body {
  padding: clamp(20px, 3.4vw, 32px);
}

.page-faq .faq-contact__body > p:first-child {
  margin-top: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--paper);
}

.page-faq .faq-contact__list {
  margin: 20px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-contact__row dt {
  flex: none;
  width: 88px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  padding-top: 2px;
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: 15px;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__row dd a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(242, 193, 78, 0.35);
}

.page-faq .faq-contact__row dd a:hover {
  color: var(--gold-deep);
  border-bottom-color: var(--gold-deep);
}

.page-faq .faq-contact__note {
  margin: 18px 0 22px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-contact__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 242, 208, 0.35);
}

.page-faq .faq-contact__media {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 200px;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-quick__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-faq .faq-contact__panel {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-faq .faq-contact__media {
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__grid {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }

  .page-faq .faq-index .toc__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-faq .faq-index .toc__link {
    padding: 9px 10px 9px 12px;
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid transparent;
  }

  .page-faq .faq-index .toc__link[aria-current="true"] {
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(56, 242, 208, 0.12), transparent 80%);
  }

  .page-faq .faq-item summary {
    font-size: 16.5px;
    padding-right: 52px;
  }

  .page-faq .faq-item__a {
    padding-right: 52px;
    max-width: 70ch;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-quick__item {
    padding: 16px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }

  .page-faq .faq-quick__item,
  .page-faq .faq-index .toc__link,
  .page-faq .faq-item summary {
    transition: none;
  }
}