.page-faq {
  background: var(--paper);
  color: var(--ink-deep);
}

.page-faq .faq-topbar {
  padding: clamp(18px, 3vw, 30px) 0 clamp(8px, 1.6vw, 14px);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(34px, 5vw, 68px) 0 clamp(38px, 6vw, 78px);
  background: var(--ink);
  color: var(--paper);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, var(--line-ink) 1px, transparent 1px);
  background-size: clamp(64px, 9vw, 118px) 100%;
  opacity: 0.45;
  pointer-events: none;
}

.page-faq .faq-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 52px);
  align-items: center;
}

.page-faq .faq-hero .eyebrow {
  color: var(--mint);
}

.page-faq .faq-hero h1 {
  margin: 16px 0 0;
  max-width: 18ch;
  color: var(--paper);
}

.page-faq .faq-hero .lead {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 52ch;
  color: var(--silver);
}

.page-faq .faq-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(18px, 3.6vw, 40px);
  margin-top: clamp(22px, 3.6vw, 34px);
  padding-top: clamp(16px, 2.4vw, 22px);
  border-top: 1px solid var(--line-ink);
}

.page-faq .faq-fact {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-faq .faq-fact-num {
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1;
  color: var(--paper);
}

.page-faq .faq-fact-label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--silver-dim);
}

.page-faq .faq-hero-media {
  margin: 0;
}

.page-faq .faq-hero-media .media-frame {
  overflow: hidden;
  border: 1px solid var(--line-ink);
  border-radius: var(--radius-card);
  box-shadow: 0 26px 50px -34px rgba(0, 0, 0, 0.75);
}

/* 分类跳转条 */
.page-faq .faq-jump {
  padding: clamp(16px, 2.6vw, 24px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-jump-list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-jump-list li {
  flex: 0 0 auto;
}

.page-faq .faq-jump-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-pill);
  background: var(--paper-raised);
  color: var(--ink-deep);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-jump-link:hover,
.page-faq .faq-jump-link:focus-visible {
  border-color: var(--red);
  color: var(--red);
  background: #FFFDFA;
}

.page-faq .faq-jump-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

/* 区块骨架 */
.page-faq .faq-section {
  padding: clamp(32px, 5vw, 64px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-section:last-of-type {
  border-bottom: 0;
}

.page-faq .faq-section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3.5vw, 36px);
}

.page-faq .faq-section-num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--red);
}

.page-faq .faq-section-num::after {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--red);
  opacity: 0.5;
}

.page-faq .faq-section-aside h2 {
  margin: 12px 0 0;
  max-width: 18ch;
  font-size: clamp(21px, 2.6vw, 27px);
  line-height: 1.32;
  letter-spacing: -0.01em;
}

.page-faq .faq-aside-note {
  margin: 14px 0 0;
  max-width: 32ch;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate);
}

.page-faq .faq-aside-tag {
  margin-top: 16px;
}

.page-faq .faq-section-main {
  display: flex;
  flex-direction: column;
  gap: clamp(20px, 3.2vw, 30px);
  min-width: 0;
}

/* 问答条目 */
.page-faq .faq-list {
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 0;
  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(--red);
  outline-offset: 3px;
}

.page-faq .faq-item-num {
  flex: 0 0 auto;
  padding-top: 4px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--slate);
}

.page-faq .faq-item-q {
  flex: 1 1 auto;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink-deep);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item-mark {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 5px;
}

.page-faq .faq-item-mark::before,
.page-faq .faq-item-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 1.5px;
  background: var(--red);
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item-mark::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item-mark::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.page-faq .faq-item[open] .faq-item-q {
  color: var(--red);
}

.page-faq .faq-item-body {
  padding: 0 0 18px;
}

.page-faq .faq-item-body p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

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

.page-faq .faq-item-body strong {
  color: var(--ink-deep);
  font-weight: 700;
}

.page-faq .faq-item-body a {
  color: var(--red);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-faq .faq-item-body a:hover,
.page-faq .faq-item-body a:focus-visible {
  color: var(--red-deep);
}

/* 配图 */
.page-faq .faq-figure {
  margin: 0;
}

.page-faq .faq-figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
}

.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* 联系卡片 */
.page-faq .faq-contact {
  margin-top: clamp(6px, 1.6vw, 12px);
}

.page-faq .faq-contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid var(--line-ink);
  border-radius: var(--radius-card);
  background: var(--ink);
  color: var(--paper);
}

.page-faq .faq-contact-label {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--silver-dim);
}

.page-faq .faq-contact-value {
  margin: 0;
  font-size: clamp(15px, 2vw, 18px);
  line-height: 1.45;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact-value--mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-faq .faq-contact-card .copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  padding: 8px 16px;
  border: 1px solid var(--line-ink);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--mint);
  font-family: var(--font-body);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-contact-card .copy-btn:hover,
.page-faq .faq-contact-card .copy-btn:focus-visible {
  border-color: var(--mint);
  background: rgba(57, 242, 200, 0.08);
}

.page-faq .faq-contact-card .copy-btn[data-copied] {
  border-color: var(--mint);
  color: var(--paper);
}

.page-faq .faq-contact-note {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* 断点 */
@media (min-width: 640px) {
  .page-faq .faq-item-body {
    padding-left: 46px;
  }

  .page-faq .faq-item-q {
    font-size: 16.5px;
  }
}

@media (min-width: 820px) {
  .page-faq .faq-contact-card {
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: clamp(20px, 3vw, 34px);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .faq-section-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: start;
  }

  .page-faq .faq-section-aside {
    position: sticky;
    top: calc(var(--header-offset) + 16px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item-mark::before,
  .page-faq .faq-item-mark::after,
  .page-faq .faq-item-q,
  .page-faq .faq-jump-link,
  .page-faq .faq-contact-card .copy-btn {
    transition: none;
  }
}
<<<END>>>