.page-faq {
  --faq-cut: 18px;
  --faq-gap: clamp(18px, 3vw, 34px);
  background:
    radial-gradient(120% 60% at 12% -6%, rgba(46, 230, 214, 0.14), transparent 60%),
    linear-gradient(180deg, var(--abyss-900) 0%, var(--abyss-700) 58%, var(--abyss-900) 100%);
  color: var(--shell-100);
  font-family: var(--font-body);
  padding-bottom: clamp(56px, 9vw, 110px);
  overflow-x: hidden;
}

.page-faq a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan-strong);
}

.page-faq a:hover,
.page-faq a:focus-visible {
  color: var(--shell-100);
  border-bottom-color: var(--cyan-400);
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  list-style: none;
  margin: 0 0 clamp(20px, 4vw, 34px);
  padding: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--stone-500);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5em;
  color: var(--stone-500);
}

.page-faq .breadcrumb a {
  border-bottom: none;
  color: var(--stone-500);
}

.page-faq .breadcrumb a:hover {
  color: var(--cyan-400);
}

.page-faq .eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan-400);
  text-transform: uppercase;
}

/* ---------- 首屏 ---------- */
.faq-hero {
  padding: clamp(28px, 6vw, 72px) 0 clamp(24px, 4vw, 44px);
  position: relative;
}

.faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--line-cyan-strong), transparent);
}

.faq-hero__inner {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.2rem, 7.5vw, 4.4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
  max-width: 16em;
  color: var(--shell-100);
}

.faq-hero__lead {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.82);
}

.faq-hero__lane {
  border: 1px solid var(--line-cyan);
  background: rgba(10, 53, 80, 0.55);
  padding: clamp(18px, 3vw, 26px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

.faq-lane__cap {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stone-500);
}

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

.faq-lane li {
  position: relative;
  padding-left: 22px;
}

.faq-lane li::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--line-cyan-strong);
}

.faq-lane li:first-child::before {
  top: 50%;
}

.faq-lane li:last-child::before {
  bottom: 50%;
}

.faq-lane a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: none;
  font-weight: 700;
  font-size: clamp(15px, 2.6vw, 17px);
  color: var(--shell-100);
  transition: color 0.25s var(--ease), transform 0.25s var(--ease);
}

.faq-lane a:hover,
.faq-lane a:focus-visible {
  color: var(--coral-500);
  transform: translateX(4px);
}

.faq-lane__num {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--clay-500);
  font-variant-numeric: tabular-nums;
}

/* ---------- 插图 ---------- */
.faq-figure {
  margin: clamp(26px, 4vw, 46px) auto 0;
}

.page-faq .media-frame {
  position: relative;
  overflow: hidden;
  background: rgba(4, 28, 44, 0.8);
  border: 1px solid var(--line-cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.faq-figure figcaption,
.faq-divider figcaption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--stone-500);
}

.faq-divider {
  margin: clamp(34px, 6vw, 64px) auto;
}

/* ---------- 主体布局 ---------- */
.faq-layout {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(30px, 5vw, 56px);
}

.faq-index {
  border-top: 2px solid var(--cyan-400);
  padding-top: 14px;
}

.faq-index__cap {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--stone-500);
}

.faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.faq-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--shell-100);
  background: rgba(19, 90, 122, 0.28);
  border: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease);
}

.faq-index__list a:hover,
.faq-index__list a:focus-visible {
  background: rgba(46, 230, 214, 0.14);
  border-color: var(--line-cyan-strong);
  color: var(--shell-100);
}

.faq-index__list span {
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--clay-500);
  font-variant-numeric: tabular-nums;
}

/* ---------- 问答块 ---------- */
.faq-block {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.faq-block + .faq-block {
  margin-top: clamp(40px, 6vw, 72px);
}

.faq-block__head {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  column-gap: 14px;
  border-bottom: 1px solid var(--line-cyan-strong);
  padding-bottom: 14px;
  margin-bottom: 18px;
}

.faq-block__num {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--coral-500);
  font-variant-numeric: tabular-nums;
}

.faq-block__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.45rem, 4.4vw, 2.05rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--shell-100);
}

.faq-block__note {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--stone-500);
}

.faq-item {
  background: linear-gradient(180deg, rgba(19, 90, 122, 0.26), rgba(10, 53, 80, 0.5));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

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

.faq-item[open] {
  background: linear-gradient(180deg, rgba(46, 230, 214, 0.1), rgba(10, 53, 80, 0.62));
  border-color: var(--line-cyan-strong);
}

.faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(15px, 2.6vw, 20px) clamp(16px, 3vw, 24px);
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: clamp(15px, 2.7vw, 17px);
  line-height: 1.55;
  color: var(--shell-100);
}

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

.faq-item summary:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: -4px;
}

.faq-item__q {
  flex: 1 1 auto;
}

.faq-item__mark {
  flex: 0 0 auto;
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 1px solid var(--line-cyan-strong);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.faq-item__mark::before,
.faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cyan-400);
}

.faq-item__mark::before {
  left: 50%;
  top: 3px;
  bottom: 3px;
  width: 2px;
  transform: translateX(-50%);
}

.faq-item__mark::after {
  top: 50%;
  left: 3px;
  right: 3px;
  height: 2px;
  transform: translateY(-50%);
}

.faq-item[open] .faq-item__mark {
  transform: rotate(45deg);
  border-color: var(--coral-500);
}

.faq-item[open] .faq-item__mark::before,
.faq-item[open] .faq-item__mark::after {
  background: var(--coral-500);
}

.faq-item__body {
  padding: 0 clamp(16px, 3vw, 24px) clamp(18px, 3vw, 24px);
}

.faq-item__body p {
  margin: 0;
  max-width: 38em;
  font-size: clamp(14px, 2.3vw, 16px);
  line-height: 1.9;
  color: rgba(244, 239, 230, 0.84);
}

/* ---------- 收尾 ---------- */
.faq-foot {
  margin-top: clamp(48px, 8vw, 80px);
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--line-cyan);
  background: linear-gradient(120deg, rgba(255, 107, 74, 0.12), rgba(10, 53, 80, 0.55) 55%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.faq-foot h2 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.35rem, 4vw, 1.9rem);
  letter-spacing: -0.02em;
  color: var(--shell-100);
}

.faq-foot p {
  margin: 0 0 20px;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 239, 230, 0.8);
}

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

.page-faq .btn {
  border-bottom: none;
}

/* ---------- 平板及桌面 ---------- */
@media (min-width: 760px) {
  .faq-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }

  .faq-lane a {
    padding: 14px 0;
  }
}

@media (min-width: 1000px) {
  .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: start;
  }

  .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .faq-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .faq-index__list li + li {
    border-top: 1px solid var(--line-soft);
  }

  .faq-index__list a {
    display: flex;
    width: 100%;
    padding: 11px 12px;
    background: transparent;
    border: none;
  }

  .faq-index__list a:hover,
  .faq-index__list a:focus-visible {
    background: rgba(46, 230, 214, 0.1);
  }

  .faq-figure,
  .faq-divider {
    max-width: var(--maxw);
  }

  .faq-figure {
    margin-left: auto;
    margin-right: auto;
  }
}

@media (min-width: 1200px) {
  .faq-hero h1 {
    max-width: 13em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-lane a,
  .page-faq .faq-item,
  .page-faq .faq-item__mark {
    transition: none;
  }

  .page-faq .faq-lane a:hover {
    transform: none;
  }
}
<<<END>>>