.page-faq {
  --faq-rail-w: 280px;
  display: block;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-crumb {
  padding-top: 18px;
}

.page-faq .faq-hero {
  padding-top: 14px;
}

.page-faq .faq-hero-frame {
  position: relative;
  border: 1px solid var(--grid-line);
  border-radius: 2px;
  padding: clamp(28px, 5vw, 56px) clamp(20px, 4vw, 52px);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(43, 227, 199, 0.10), transparent 55%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900));
  overflow: hidden;
}

.page-faq .faq-hero-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.65;
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 50, 71, 0.55) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(0deg, rgba(30, 50, 71, 0.35) 0 1px, transparent 1px 80px);
}

.page-faq .faq-corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  pointer-events: none;
  z-index: 2;
}

.page-faq .faq-corner--tl { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.page-faq .faq-corner--tr { top: 8px; right: 8px; border-left: 0; border-bottom: 0; }
.page-faq .faq-corner--bl { bottom: 8px; left: 8px; border-right: 0; border-top: 0; }
.page-faq .faq-corner--br { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }

.page-faq .faq-hero-kicker {
  position: relative;
  z-index: 1;
  margin: 0 0 16px;
  color: var(--cyan);
  letter-spacing: 0.18em;
}

.page-faq .faq-hero h1 {
  position: relative;
  z-index: 1;
  margin: 0 0 20px;
  max-width: 22ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(27px, 4.6vw, 46px);
  line-height: 1.22;
  color: var(--text);
}

.page-faq .faq-hero-lead {
  position: relative;
  z-index: 1;
  margin: 0 0 30px;
  max-width: 64ch;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--text-2);
}

.page-faq .faq-hero-stats {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 32px;
  margin: 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--grid-line);
}

.page-faq .faq-hero-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-hero-stats .num {
  font-family: var(--font-num);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--orange);
  line-height: 1;
}

.page-faq .faq-stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--sage);
}

/* ---------- 双栏骨架 ---------- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 34px;
  padding-top: clamp(34px, 5vw, 56px);
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  color: var(--sage);
  letter-spacing: 0.16em;
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
}

.page-faq .faq-rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--text-2);
  text-decoration: none;
  border-bottom: 2px solid var(--grid-line);
  border-radius: 2px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-faq .faq-rail-link:hover {
  color: var(--text);
  border-color: var(--cyan);
  background: var(--ink-800);
}

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

.page-faq .faq-rail-num {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  color: var(--orange);
}

.page-faq .faq-rail-cta {
  margin-top: 18px;
  width: 100%;
  justify-content: center;
}

/* ---------- 问题区块 ---------- */

.page-faq .faq-block + .faq-block {
  margin-top: clamp(46px, 6vw, 72px);
}

.page-faq .faq-intro {
  margin: 18px 0 24px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-2);
}

.page-faq .faq-item {
  border: 1px solid var(--grid-line);
  border-radius: 2px;
  background: var(--ink-800);
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 12px;
}

.page-faq .faq-item:hover {
  border-color: rgba(43, 227, 199, 0.5);
  transform: translateY(-2px);
}

.page-faq .faq-item[open] {
  border-color: rgba(43, 227, 199, 0.4);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  transition: background 160ms var(--ease), color 160ms var(--ease);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-num);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
}

.page-faq .faq-item > summary:hover {
  background: var(--ink-700);
}

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

.page-faq .faq-answer {
  padding: 4px 20px 22px;
  border-top: 1px solid var(--grid-line);
  animation: faqReveal 160ms var(--ease);
}

.page-faq .faq-answer p {
  margin: 14px 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-2);
}

@keyframes faqReveal {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 步骤刻度线 ---------- */

.page-faq .faq-steps {
  position: relative;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  position: relative;
  padding: 0 0 20px 46px;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 30px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-deep), var(--grid-line));
}

.page-faq .faq-step:last-child {
  padding-bottom: 0;
}

.page-faq .faq-step:last-child::before {
  display: none;
}

.page-faq .faq-step-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink-900);
  background: var(--cyan);
  border-radius: 2px;
}

.page-faq .faq-step p {
  margin: 2px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-2);
}

/* ---------- 配图 ---------- */

.page-faq .faq-figure {
  margin: 22px 0 0;
  border-radius: 2px;
}

.page-faq .faq-figure--flow {
  aspect-ratio: 3 / 2;
}

.page-faq .faq-figure--wide-shot {
  aspect-ratio: 12 / 7;
}

/* ---------- 联系块 ---------- */

.page-faq .faq-contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin-top: 22px;
  border: 1px solid var(--grid-line);
  border-radius: 2px;
  background:
    linear-gradient(135deg, rgba(255, 107, 44, 0.09), transparent 46%),
    var(--ink-800);
  overflow: hidden;
}

.page-faq .faq-contact-list {
  margin: 0;
  padding: 24px 20px;
}

.page-faq .faq-contact-row + .faq-contact-row {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--grid-line);
}

.page-faq .faq-contact-row dt {
  margin: 0 0 6px;
  color: var(--sage);
  letter-spacing: 0.12em;
}

.page-faq .faq-contact-row dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}

.page-faq .faq-contact-row dd a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 199, 0.35);
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-contact-row dd a:hover {
  color: var(--text);
  border-bottom-color: var(--cyan);
}

.page-faq .faq-contact-row dd a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-contact-ask {
  padding: 24px 20px;
  border-top: 1px solid var(--grid-line);
  background: rgba(16, 31, 51, 0.72);
}

.page-faq .faq-contact-ask-title {
  margin: 0 0 14px;
  color: var(--orange);
  letter-spacing: 0.14em;
}

.page-faq .faq-ask-list {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-ask-list li {
  position: relative;
  padding: 7px 0 7px 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-2);
}

.page-faq .faq-ask-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 15px;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-faq .faq-contact-btn {
  width: 100%;
  justify-content: center;
}

/* ---------- 顺手可看 ---------- */

.page-faq .faq-helpful-links {
  margin-top: clamp(36px, 5vw, 56px);
}

.page-faq .faq-helpful-title {
  margin: 0 0 14px;
  color: var(--sage);
  letter-spacing: 0.16em;
}

.page-faq .faq-helpful-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-faq .faq-helpful-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  border: 1px solid var(--grid-line);
  border-radius: 2px;
  background: var(--ink-800);
  text-decoration: none;
  transition: border-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-faq .faq-helpful-card:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

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

.page-faq .faq-helpful-tag {
  align-self: flex-start;
}

.page-faq .faq-helpful-name {
  font-family: var(--font-head);
  font-size: 17px;
  line-height: 1.45;
  color: var(--text);
}

.page-faq .faq-helpful-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-2);
}

/* ---------- 桌面布局 ---------- */

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-faq .faq-rail-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail-link {
    border-bottom: 0;
    border-left: 2px solid var(--grid-line);
    white-space: normal;
  }

  .page-faq .faq-rail-cta {
    margin-top: 24px;
  }

  .page-faq .faq-contact-card {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-faq .faq-contact-list {
    padding: 28px 30px;
  }

  .page-faq .faq-contact-ask {
    padding: 28px 30px;
    border-top: 0;
    border-left: 1px solid var(--grid-line);
  }

  .page-faq .faq-contact-btn {
    width: auto;
  }

  .page-faq .faq-helpful-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-answer {
    animation: none;
  }

  .page-faq .faq-item:hover,
  .page-faq .faq-helpful-card:hover {
    transform: none;
  }
}
<<<END>>>