.page-faq {
  --faq-panel-soft: rgba(18, 46, 71, 0.42);
  --faq-cta-bg: rgba(27, 62, 92, 0.45);
  background: var(--ink);
  color: var(--frost);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 4vw, 44px) 0 clamp(36px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(760px 380px at 88% 8%, rgba(34, 211, 197, 0.18), transparent 70%),
    radial-gradient(620px 320px at 2% 96%, rgba(245, 166, 35, 0.14), transparent 72%);
}

.page-faq .faq-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

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

.page-faq .faq-hero__label {
  margin-top: var(--sp-2);
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(46px, 9vw, 116px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--frost);
}

.page-faq .faq-hero__lead {
  max-width: 52ch;
  margin-top: var(--sp-2);
  color: var(--mist);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
  margin: var(--sp-3) 0 0;
  padding: var(--sp-2) 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .faq-hero__stats .num {
  display: block;
  margin-bottom: 2px;
  font-size: 26px;
  line-height: 1.05;
  font-weight: 700;
  color: var(--amber);
}

.page-faq .faq-hero__media {
  width: 100%;
  aspect-ratio: 16 / 10;
}

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

/* ---------- 三档对照 ---------- */
.page-faq .faq-tiers {
  padding: clamp(40px, 6vw, 80px) 0;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 46, 71, 0.38), rgba(11, 31, 51, 0) 60%);
}

.page-faq .faq-tiers__top {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: center;
}

.page-faq .faq-tiers__title {
  margin: 10px 0 0;
  font-size: clamp(30px, 4.4vw, 56px);
  line-height: 1.04;
}

.page-faq .faq-tiers__intro .lead {
  margin-top: 16px;
  max-width: 46ch;
  color: var(--mist);
}

.page-faq .faq-tiers__visual {
  width: 100%;
  aspect-ratio: 2 / 1;
}

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

.page-faq .faq-tiers__grid {
  display: grid;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .tier {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--panel);
}

.page-faq .tier--feature {
  background: var(--panel-lift);
}

.page-faq .tier__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .tier__name {
  margin: 0;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--frost);
}

.page-faq .tier--feature .tier__name {
  color: var(--cyan);
}

.page-faq .tier__list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.page-faq .tier__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-faq .tier__row dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-faq .tier__row dd {
  margin: 0;
  font-size: 15px;
  color: var(--frost);
  text-align: right;
}

.page-faq .tier__row dd .num {
  margin-right: 2px;
  font-size: 22px;
  font-weight: 700;
  color: var(--amber);
}

.page-faq .tier__note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 目录 + 问题列表 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  padding: clamp(40px, 6vw, 88px) 0;
}

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

.page-faq .faq-sidebar__inner {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-toc {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc li {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-toc a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 4px 11px 12px;
  border-left: 2px solid transparent;
  color: var(--mist);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-toc a:hover {
  color: var(--frost);
  background: var(--faq-cta-bg);
}

.page-faq .faq-toc a[aria-current] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  font-weight: 700;
}

.page-faq .faq-toc__idx,
.page-faq .faq-toc__count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-toc a[aria-current] .faq-toc__idx {
  color: var(--cyan);
}

.page-faq .faq-toc__count {
  margin-left: auto;
}

.page-faq .faq-sidebar__cta {
  margin-top: var(--sp-2);
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.page-faq .faq-sidebar__cta p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

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

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(32px, 5vw, 56px);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__head .label {
  color: var(--cyan);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--frost);
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  background: var(--faq-panel-soft);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item[open] {
  border-color: var(--cyan);
  background: var(--panel);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--frost);
}

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

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

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--amber);
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "–";
  color: var(--cyan);
}

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

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-item__qtext {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__a {
  padding: 0 16px 16px 44px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-faq .faq-item__a p + p {
  margin-top: 8px;
}

.page-faq .faq-item__a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  padding: clamp(40px, 6vw, 80px) 0;
  border-top: 1px solid var(--line);
  background: var(--ink-deep);
}

.page-faq .faq-contact__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-contact__title {
  margin: 10px 0 0;
  font-size: clamp(26px, 3.6vw, 46px);
  line-height: 1.08;
}

.page-faq .faq-contact__lead {
  margin-top: 16px;
  max-width: 44ch;
  color: var(--mist);
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--sp-2);
}

.page-faq .faq-contact__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-contact__list li {
  display: grid;
  gap: 5px;
  padding: 15px 18px;
  background: var(--panel);
}

.page-faq .faq-contact__k {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-contact__v {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--frost);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__v .num {
  color: var(--amber);
  font-weight: 700;
}

.page-faq .faq-contact__v a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-mail {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.01em;
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (max-width: 599px) {
  .page-faq .faq-item__a {
    padding-left: 16px;
  }

  .page-faq .faq-hero__stats {
    gap: 14px 24px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-tiers__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact__list li {
    grid-template-columns: 104px minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: 1.15fr 0.85fr;
  }

  .page-faq .faq-hero__media {
    aspect-ratio: 4 / 3;
  }

  .page-faq .faq-tiers__top {
    grid-template-columns: 1fr 0.82fr;
  }

  .page-faq .faq-contact__inner {
    grid-template-columns: 5fr 7fr;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: clamp(36px, 5vw, 72px);
  }

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