.page-faq {
  --faq-line: rgba(18, 42, 34, .16);
  --faq-line-strong: rgba(18, 42, 34, .34);
  --faq-gap: clamp(14px, 3vw, 22px);
  background: var(--ash);
  color: var(--ink);
  font-family: var(--font-body);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏索引 ---------- */
.page-faq .faq-intro {
  position: relative;
  background:
    linear-gradient(90deg, var(--vermilion) 0 33.3%, var(--signal) 33.3% 66.6%, var(--cyan) 66.6% 100%) top left / 100% 4px no-repeat,
    var(--paper);
  border-bottom: 1px solid var(--faq-line);
  padding: clamp(26px, 5vw, 48px) 0 clamp(28px, 5vw, 54px);
}

.page-faq .faq-intro::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, var(--faq-line) 1px, transparent 1px);
  background-size: 88px 100%;
  opacity: .55;
  pointer-events: none;
}

.page-faq .faq-intro__grid {
  position: relative;
  z-index: 1;
}

.page-faq .faq-intro__eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--iron);
}

.page-faq .faq-intro__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 7vw, 58px);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--ink-green);
  max-width: 20ch;
}

.page-faq .faq-intro__lead {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-chips {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .faq-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  border: 1px solid var(--faq-line-strong);
  border-radius: 999px;
  background: rgba(247, 244, 237, .7);
  color: var(--ink-green);
  font-size: 13px;
  text-decoration: none;
  transition: border-color .18s var(--ease), color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-chip:hover {
  border-color: var(--vermilion);
  color: var(--vermilion);
  background: var(--paper);
}

.page-faq .faq-chip__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--vermilion);
}

.page-faq .faq-intro__figure {
  margin: 24px 0 0;
}

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

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(26px, 5vw, 54px);
}

/* ---------- 侧边目录 ---------- */
.page-faq .faq-toc {
  border-left: 3px solid var(--ink-green);
  padding: 2px 0 2px 14px;
}

.page-faq .faq-toc__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--iron);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--faq-line);
  border-radius: 2px;
  background: var(--paper);
  font-size: 14px;
  color: var(--ink-green);
  text-decoration: none;
  transition: border-color .18s var(--ease), background .18s var(--ease), transform .18s var(--ease);
}

.page-faq .faq-toc__link:hover {
  border-color: var(--cyan);
  background: var(--ash);
  transform: translateY(-2px);
}

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

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--vermilion);
}

.page-faq .faq-toc__foot {
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--iron);
}

.page-faq .faq-toc__foot a {
  color: var(--ink-green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 章节头 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 110px;
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(30px, 5vw, 54px);
}

.page-faq .faq-section__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: baseline;
  border-bottom: 2px solid var(--ink-green);
  padding-bottom: 12px;
  margin-bottom: 4px;
}

.page-faq .faq-section__head .section__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--vermilion);
}

.page-faq .faq-section__head .section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--ink-green);
}

.page-faq .faq-section__head .section__aside {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--iron);
}

.page-faq .faq-section:target .faq-section__head {
  border-bottom-color: var(--vermilion);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-line);
  transition: background .2s var(--ease), box-shadow .2s var(--ease);
}

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

.page-faq .faq-item__q {
  position: relative;
  display: block;
  list-style: none;
  cursor: pointer;
  padding: 16px 46px 16px 14px;
  font-size: clamp(15px, 2.4vw, 17px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink-green);
  transition: color .18s var(--ease);
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 14px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--vermilion);
  transition: transform .2s var(--ease), color .2s var(--ease);
}

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

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

.page-faq .faq-item[open] .faq-item__q::after {
  content: "+";
  transform: translateY(-50%) rotate(45deg);
  color: var(--cyan);
}

.page-faq .faq-item__a {
  padding: 0 18px 18px 14px;
  max-width: 68ch;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

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

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

.page-faq .faq-item__a a:hover {
  color: var(--vermilion);
  text-decoration-color: var(--vermilion);
}

/* ---------- 步骤标签 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-steps__item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .faq-steps__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  padding: 2px 7px;
  background: var(--ink-green);
  color: var(--paper);
}

.page-faq .faq-steps__item:nth-child(2) .faq-steps__num {
  background: var(--vermilion);
}

.page-faq .faq-steps__item:nth-child(3) .faq-steps__num {
  background: var(--signal);
  color: var(--ink-green);
}

/* ---------- 客服卡片 ---------- */
.page-faq .faq-support {
  display: grid;
  gap: 18px;
  margin-top: 26px;
}

.page-faq .faq-support__card {
  background: var(--ink-green);
  color: var(--paper);
  padding: 24px 20px;
  border-top: 4px solid var(--vermilion);
}

.page-faq .faq-support__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--signal);
}

.page-faq .faq-support__mail {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.6vw, 17px);
  line-height: 1.5;
  color: var(--paper);
  word-break: break-all;
  user-select: all;
}

.page-faq .faq-support__note {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(247, 244, 237, .82);
}

.page-faq .faq-support__figure {
  margin: 0;
}

/* ---------- 相关入口 ---------- */
.page-faq .faq-links {
  margin-top: clamp(34px, 6vw, 62px);
  border-top: 2px solid var(--ink-green);
  padding-top: 18px;
}

.page-faq .faq-links__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3vw, 26px);
  letter-spacing: -.01em;
  color: var(--ink-green);
}

.page-faq .faq-links__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-links__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 15px;
  background: var(--paper);
  border-left: 3px solid var(--cyan);
  color: var(--ink-green);
  font-size: 14px;
  text-decoration: none;
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-links__link:hover {
  transform: translateY(-3px);
  border-left-color: var(--vermilion);
}

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

.page-faq .faq-links__arrow {
  font-family: var(--font-mono);
  color: var(--iron);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-links__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
    align-items: stretch;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-intro__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: center;
  }

  .page-faq .faq-intro__figure {
    margin: 0;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 60px);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc__link {
    white-space: normal;
    width: 100%;
    border-color: transparent;
    background: transparent;
  }

  .page-faq .faq-toc__link:hover {
    background: var(--paper);
    border-color: var(--faq-line-strong);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition: none !important;
    animation: none !important;
  }

  .page-faq .faq-links__link:hover,
  .page-faq .faq-toc__link:hover {
    transform: none;
  }
}
<<<END>>>