.page-faq {
  --faq-line-dark: rgba(10, 37, 64, .14);
  --faq-ink-soft: rgba(255, 255, 255, .76);
  background: var(--deep-sea);
  color: var(--white);
  padding-bottom: clamp(56px, 8vw, 110px);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 54px) 0 clamp(30px, 4.5vw, 56px);
  background:
    radial-gradient(120% 90% at 88% -20%, rgba(0, 229, 255, .22), transparent 62%),
    radial-gradient(90% 80% at -10% 0%, rgba(255, 159, 28, .12), transparent 58%),
    linear-gradient(180deg, var(--midnight) 0%, var(--deep-sea) 100%);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}
.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(124, 243, 255, .07) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(124, 243, 255, .05) 0 1px, transparent 1px 88px);
  pointer-events: none;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 82%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 82%);
}
.page-faq .faq-hero > .container {
  position: relative;
  z-index: 1;
}
.page-faq .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
  font-size: 13px;
  color: var(--gray);
}
.page-faq .faq-kicker {
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 14px;
}
.page-faq .faq-title {
  font-size: clamp(38px, 8.4vw, 88px);
  line-height: .98;
  letter-spacing: -.02em;
  font-weight: 800;
  margin: 0;
}
.page-faq .faq-title-dot {
  color: var(--amber);
  padding: 0 .06em;
}
.page-faq .faq-title .accent {
  font-size: clamp(26px, 5vw, 56px);
  letter-spacing: -.01em;
}
.page-faq .faq-lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}

/* ---------- 两栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(30px, 5vw, 60px);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index-figure {
  margin: 0 0 18px;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--steel);
}
.page-faq .faq-index-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-faq .faq-index-label {
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gray);
  margin: 0 0 10px;
}
.page-faq .faq-index-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  scrollbar-width: none;
}
.page-faq .faq-index-list::-webkit-scrollbar { display: none; }
.page-faq .faq-index-list li { flex: 0 0 auto; }
.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 15px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, .05);
  color: rgba(255, 255, 255, .86);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color .24s var(--ease), border-color .24s var(--ease), background-color .24s var(--ease);
}
.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}
.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--cyan);
  border-color: var(--line-cyan);
}
.page-faq .faq-index-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-block {
  scroll-margin-top: calc(var(--header-space) + 24px);
  margin-bottom: clamp(40px, 6vw, 76px);
}
.page-faq .faq-block:last-child { margin-bottom: 0; }
.page-faq .faq-block-title {
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.16;
  letter-spacing: -.01em;
  font-weight: 700;
  margin: 12px 0 0;
}
.page-faq .faq-block-lede {
  margin: 12px 0 clamp(18px, 3vw, 28px);
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--faq-ink-soft);
}
.page-faq .faq-figure {
  margin: 0 0 clamp(18px, 3vw, 28px);
  aspect-ratio: 4 / 3;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: linear-gradient(140deg, var(--steel), var(--midnight));
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-item { border-top: 1px solid var(--line); }
.page-faq .faq-list > .faq-item:last-of-type { border-bottom: 1px solid var(--line); }
.page-faq .faq-item > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 2px;
  cursor: pointer;
  list-style: none;
}
.page-faq .faq-item > summary::-webkit-details-marker { display: none; }
.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: var(--r-sm);
}
.page-faq .faq-q {
  margin: 0;
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.5;
  font-weight: 600;
  color: var(--white);
}
.page-faq .faq-mark {
  flex: none;
  position: relative;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--line-cyan);
  color: var(--white);
  transition: transform .24s var(--ease), border-color .24s var(--ease), color .24s var(--ease);
}
.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: currentColor;
  border-radius: 2px;
  transform: translate(-50%, -50%);
}
.page-faq .faq-mark::before { width: 11px; height: 1.5px; }
.page-faq .faq-mark::after { width: 1.5px; height: 11px; }
.page-faq .faq-item[open] .faq-mark {
  transform: rotate(45deg);
  border-color: var(--amber);
  color: var(--amber);
}
.page-faq .faq-answer {
  padding: 0 2px 22px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--faq-ink-soft);
}
.page-faq .faq-answer p { margin: 0 0 12px; }
.page-faq .faq-answer p:last-child { margin-bottom: 0; }

.page-faq .faq-steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-faq .faq-steps li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 38px;
  line-height: 1.7;
}
.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line-cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
}

/* ---------- 纸面章节 ---------- */
.page-faq .faq-block--paper {
  background: var(--paper);
  color: var(--deep-sea);
  border-radius: var(--r-xl);
  padding: clamp(22px, 4vw, 44px);
}
.page-faq .faq-block--paper .faq-block-title { color: var(--deep-sea); }
.page-faq .faq-block--paper .faq-block-lede { color: rgba(10, 37, 64, .74); }
.page-faq .faq-block--paper .section-num { color: var(--deep-sea); }
.page-faq .faq-block--paper .faq-item { border-top-color: var(--faq-line-dark); }
.page-faq .faq-block--paper .faq-list > .faq-item:last-of-type { border-bottom-color: var(--faq-line-dark); }
.page-faq .faq-block--paper .faq-q { color: var(--deep-sea); }
.page-faq .faq-block--paper .faq-mark {
  color: var(--deep-sea);
  border-color: rgba(10, 37, 64, .28);
}
.page-faq .faq-block--paper .faq-item[open] .faq-mark {
  color: var(--amber);
  border-color: var(--amber);
}
.page-faq .faq-block--paper .faq-answer { color: rgba(10, 37, 64, .84); }
.page-faq .faq-block--paper .faq-answer a,
.page-faq .faq-block--paper .faq-lead-link {
  color: var(--deep-sea);
  text-decoration: underline;
  text-decoration-color: rgba(255, 159, 28, .8);
  text-underline-offset: 3px;
}
.page-faq .faq-block--paper .faq-steps li::before {
  color: var(--deep-sea);
  border-color: rgba(10, 37, 64, .26);
}
.page-faq .faq-answer a {
  color: var(--cyan-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-status {
  margin-top: clamp(20px, 3vw, 30px);
  border: 1px solid var(--faq-line-dark);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .55);
  overflow: hidden;
}
.page-faq .faq-status-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 11px 16px;
  font-size: 14px;
  border-top: 1px solid rgba(10, 37, 64, .1);
}
.page-faq .faq-status-row:first-child { border-top: 0; }
.page-faq .faq-status-key { color: rgba(10, 37, 64, .68); }
.page-faq .faq-status-val {
  font-weight: 700;
  color: var(--deep-sea);
  text-align: right;
}

.page-faq .faq-contact {
  margin-top: clamp(20px, 3vw, 28px);
  display: grid;
  gap: 14px;
}
.page-faq .faq-contact-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(10, 37, 64, .78);
}
.page-faq .faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}
.page-faq .faq-copy {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  min-height: 44px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(10, 37, 64, .26);
  background: transparent;
  color: var(--deep-sea);
  font-family: var(--font-mono);
  font-size: 13px;
  cursor: pointer;
  transition: background-color .24s var(--ease), border-color .24s var(--ease), color .24s var(--ease);
}
.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  background: rgba(10, 37, 64, .07);
  border-color: var(--deep-sea);
}
.page-faq .faq-copy[data-copied] {
  border-color: var(--amber);
  color: #8a5200;
  background: rgba(255, 159, 28, .16);
}

/* ---------- 中等屏 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-index-figure { aspect-ratio: 3 / 2; }
  .page-faq .faq-lede { font-size: 17px; }
  .page-faq .faq-status { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .faq-status-row:nth-child(2) { border-top: 0; }
  .page-faq .faq-status-row:nth-child(odd) { border-right: 1px solid rgba(10, 37, 64, .1); }
  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

/* ---------- 桌面两栏 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 76px);
    align-items: start;
  }
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-space) + 20px);
  }
  .page-faq .faq-index-list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding: 0;
    border-left: 1px solid var(--line-soft);
  }
  .page-faq .faq-index-link {
    position: relative;
    justify-content: flex-start;
    border: 0;
    border-radius: 0;
    background: transparent;
    padding: 12px 12px 12px 18px;
    font-size: 15px;
    color: rgba(255, 255, 255, .76);
  }
  .page-faq .faq-index-link::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 50%;
    width: 3px;
    height: 0;
    border-radius: 2px;
    background: var(--cyan);
    transform: translateY(-50%);
    transition: height .24s var(--ease);
  }
  .page-faq .faq-index-link:hover::before,
  .page-faq .faq-index-link:focus-visible::before { height: 72%; }
  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible { background: rgba(255, 255, 255, .04); }
  .page-faq .faq-status { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .page-faq .faq-status-row:nth-child(2) { border-top: 1px solid rgba(10, 37, 64, .1); }
  .page-faq .faq-status-row:nth-child(odd) { border-right: 0; }
  .page-faq .faq-figure { aspect-ratio: 16 / 9; }
}

@media (min-width: 1240px) {
  .page-faq .faq-status { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-faq .faq-status-row:nth-child(2) { border-top: 0; }
  .page-faq .faq-status-row:nth-child(odd) { border-right: 1px solid rgba(10, 37, 64, .1); }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-mark,
  .page-faq .faq-index-link,
  .page-faq .faq-index-link::before,
  .page-faq .faq-copy { transition: none; }
}
<<<END>>>