.page-faq {
  --faq-cut: 18px;
  --faq-soft: rgba(14, 74, 107, .38);
  background: var(--ink-900);
  color: var(--white);
  padding-bottom: 88px;
  overflow-x: hidden;
}

/* ---------- 页首 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 26px 0 14px;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(760px 380px at 88% -10%, rgba(53, 242, 227, .16), transparent 68%),
    radial-gradient(520px 300px at -6% 108%, rgba(255, 106, 42, .13), transparent 70%),
    linear-gradient(158deg, var(--ink-900) 0%, var(--ink-800) 62%, var(--ink-900) 100%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(23, 57, 78, .55) 1px, transparent 1px),
    linear-gradient(180deg, rgba(23, 57, 78, .35) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(118deg, rgba(0, 0, 0, .92), transparent 74%);
  mask-image: linear-gradient(118deg, rgba(0, 0, 0, .92), transparent 74%);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 7.4vw, 54px);
  line-height: 1.06;
  letter-spacing: -.02em;
  margin: 10px 0 16px;
  max-width: 17ch;
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
}

.page-faq .faq-hero__visual {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

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

/* 分类标签条 */
.page-faq .faq-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.page-faq .faq-tabs a {
  display: inline-block;
  padding: 8px 15px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--white);
  text-decoration: none;
  background: rgba(7, 42, 68, .9);
  border: 1px solid var(--ink-700);
  transform: skewX(-9deg);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-tabs a > span {
  display: inline-block;
  transform: skewX(9deg);
}

.page-faq .faq-tabs a:hover,
.page-faq .faq-tabs a:focus-visible {
  background: rgba(53, 242, 227, .14);
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 26px;
  padding-top: 34px;
}

/* 左侧索引 */
.page-faq .faq-index {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(7, 42, 68, .92), rgba(4, 18, 31, .92));
  padding: 16px 16px 14px;
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

.page-faq .faq-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
  background: rgba(23, 57, 78, .35);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-index__list a .mono {
  font-size: 11px;
  color: var(--teal);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  color: var(--white);
  background: rgba(53, 242, 227, .12);
  border-left-color: var(--cyan);
}

.page-faq .faq-index__hint {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-index__hint a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 227, .45);
}

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

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  margin-bottom: 40px;
  scroll-margin-top: 24px;
}

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

.page-faq .faq-sec__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-sec__num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.2;
  letter-spacing: .06em;
  color: var(--ink-900);
  background: var(--cyan);
  padding: 4px 10px;
  -webkit-clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
}

.page-faq .faq-sec--action .faq-sec__num {
  background: var(--orange);
  color: var(--ink-900);
}

.page-faq .faq-sec__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(20px, 4.2vw, 26px);
  letter-spacing: -.01em;
  line-height: 1.2;
}

.page-faq .faq-sec__note {
  flex: 1 1 100%;
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--line);
  background: var(--ink-850);
  -webkit-clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

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

.page-faq .faq-item[open] {
  background: var(--ink-800);
  box-shadow: inset 3px 0 0 var(--cyan);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.5;
  color: var(--white);
}

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

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

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

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

.page-faq .faq-item__sign {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  background: var(--ink-700);
  border: 1px solid var(--ink-700);
  transform: skewX(-9deg);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  inset-inline: 5px;
  top: 50%;
  height: 2px;
  margin-top: -1px;
  background: var(--cyan);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

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

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

.page-faq .faq-item[open] .faq-item__sign::before,
.page-faq .faq-item[open] .faq-item__sign::after {
  background: var(--ink-900);
}

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

.page-faq .faq-item__a {
  padding: 0 16px 16px;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 纠错步骤 ---------- */
.page-faq .faq-steps {
  display: grid;
  gap: 16px;
  margin: 18px 0 20px;
}

.page-faq .faq-steps__fig {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  overflow: hidden;
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--faq-cut)), calc(100% - var(--faq-cut)) 100%, 0 100%);
}

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

.page-faq .faq-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .faq-steps__list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--white);
  background: var(--faq-soft);
  border-left: 2px solid var(--orange);
}

.page-faq .faq-steps__list .mono {
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--orange);
}

/* ---------- 联系面板 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--line);
  background:
    radial-gradient(420px 200px at 100% 0%, rgba(53, 242, 227, .14), transparent 70%),
    linear-gradient(135deg, rgba(7, 42, 68, .96), rgba(14, 74, 107, .45));
  -webkit-clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-faq .faq-contact__k {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--teal);
}

.page-faq .faq-contact__v {
  font-size: 16px;
  line-height: 1.55;
  color: var(--white);
  word-break: break-word;
}

.page-faq .faq-contact__v.mono {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-faq .faq-contact__v--text {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .faq-contact__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 62ch;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-top: 34px;
  }

  .page-faq .faq-sec__note {
    flex: 0 1 auto;
    margin-left: auto;
  }

  .page-faq .faq-item summary {
    padding: 17px 20px;
    font-size: 16.5px;
  }

  .page-faq .faq-item__a {
    padding: 0 20px 18px;
  }

  .page-faq .faq-item__a p {
    font-size: 15px;
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    padding: 24px;
  }

  .page-faq .faq-contact__row--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-steps {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: 22px;
  }
}

@media (min-width: 940px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
    gap: 46px;
  }

  .page-faq .faq-hero .lede {
    font-size: 16px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 52px;
    align-items: start;
    padding-top: 44px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 20px;
    padding: 18px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: 3px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__list a {
    white-space: normal;
    background: transparent;
  }

  .page-faq .faq-sec {
    margin-bottom: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tabs a,
  .page-faq .faq-item,
  .page-faq .faq-item__sign,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-index__list a {
    transition: none;
  }
}
<<<END>>>