.page-faq {
  --faq-aside: 268px;
  --faq-gap: clamp(24px, 4vw, 56px);
  color: var(--white);
  padding-top: clamp(64px, 9vw, 104px);
  padding-bottom: clamp(64px, 8vw, 104px);
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-faq .link-inline {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 210, 0.45);
  transition: border-color var(--ease), color var(--ease);
}

.page-faq .link-inline:hover,
.page-faq .link-inline:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* 面包屑 */
.page-faq .breadcrumb {
  margin-bottom: clamp(16px, 2.4vw, 26px);
}

.page-faq .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-faq .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

.page-faq .breadcrumb-link {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .breadcrumb-link:hover,
.page-faq .breadcrumb-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-faq .breadcrumb-current {
  color: var(--white);
}

/* 首屏 */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-bottom: clamp(26px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -40px;
  right: 0;
  width: min(38%, 380px);
  height: 172%;
  background: repeating-linear-gradient(
    115deg,
    rgba(47, 227, 210, 0.18) 0 1px,
    transparent 1px 22px
  );
  opacity: 0.55;
  pointer-events: none;
}

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

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 5.4vw, 52px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .lede {
  margin: 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--steel);
}

.page-faq .faq-hero__panel {
  position: relative;
  z-index: 1;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deck);
  padding: 20px 20px 6px;
}

.page-faq .faq-hero__panel .eyebrow {
  color: var(--signal);
}

.page-faq .quick-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .quick-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 44px;
  padding: 12px 0;
  color: var(--white);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  transition: color var(--ease);
}

.page-faq .quick-link::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--cyan);
  transition: transform var(--ease);
}

.page-faq .quick-link:hover,
.page-faq .quick-link:focus-visible {
  color: var(--cyan);
}

.page-faq .quick-link:hover::after {
  transform: translateX(4px);
}

.page-faq .quick-list li:last-child .quick-link {
  border-bottom: 0;
}

/* 分栏骨架 */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  padding-top: clamp(26px, 4vw, 48px);
}

.page-faq .faq-toc {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

.page-faq .faq-toc__title {
  color: var(--steel);
}

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

.page-faq .toc-link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 12px;
  border-left: 2px solid transparent;
  color: var(--steel);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.page-faq .toc-link:hover,
.page-faq .toc-link:focus-visible {
  color: var(--white);
  background: rgba(47, 227, 210, 0.08);
  border-left-color: var(--cyan);
}

.page-faq .toc-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* 章节 */
.page-faq .chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: clamp(26px, 3.4vw, 40px) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 100px;
}

.page-faq .chapter-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--steel);
  padding-left: 10px;
  border-left: 2px solid var(--line);
  transition: color var(--ease), border-color var(--ease);
}

.page-faq .chapter.is-active .chapter-num {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-faq .section-title {
  margin: 0 0 14px;
  font-size: clamp(21px, 2.6vw, 27px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .prose p {
  margin: 0 0 1em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--steel);
}

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

/* 步骤列表 */
.page-faq .step-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .step-list > li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 33, 53, 0.72);
  color: var(--white);
  font-size: 15px;
  line-height: 1.72;
  transition: border-color var(--ease);
}

.page-faq .step-list > li:hover {
  border-color: rgba(47, 227, 210, 0.55);
}

.page-faq .step-list > li.is-key {
  border-color: var(--orange);
  background: rgba(255, 106, 43, 0.07);
}

.page-faq .step-idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-faq .step-list > li.is-key .step-idx {
  color: var(--orange);
}

.page-faq .hint-bar {
  margin: 18px 0 0;
  padding: 12px 16px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 106, 43, 0.06);
  color: var(--white);
  font-size: 14px;
  line-height: 1.75;
}

/* 轮次筛选条 */
.page-faq .filter-demo {
  margin-top: 22px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deck);
}

.page-faq .filter-demo__label {
  color: var(--steel);
  margin-bottom: 12px;
}

.page-faq .round-chips {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
}

.page-faq .round-chip {
  flex: 0 0 auto;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.page-faq .round-chip:hover,
.page-faq .round-chip:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
}

.page-faq .round-chip[aria-pressed="true"] {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink-deep);
  font-weight: 700;
}

.page-faq .round-note {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

/* 配图 */
.page-faq .media {
  margin: 22px 0 0;
}

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

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

.page-faq .media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* 账号卡片 */
.page-faq .faq-cards {
  margin-top: 18px;
}

.page-faq .faq-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 33, 53, 0.72);
  transition: border-color var(--ease);
}

.page-faq .faq-card:hover {
  border-color: rgba(47, 227, 210, 0.55);
}

.page-faq .card-title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .card-body {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

/* 问答 */
.page-faq .qa-list {
  margin-top: 18px;
  border-top: 1px solid var(--line-soft);
}

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

.page-faq .qa-q {
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-height: 44px;
  padding: 15px 4px;
  color: var(--white);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
  transition: color var(--ease);
}

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

.page-faq .qa-q::before {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
}

.page-faq .qa[open] .qa-q::before {
  content: "−";
  color: var(--orange);
}

.page-faq .qa-q:hover,
.page-faq .qa-q:focus-visible {
  color: var(--cyan);
}

.page-faq .qa-a {
  padding: 0 4px 18px 30px;
}

.page-faq .qa-a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--steel);
}

/* 米白纸面区块 */
.page-faq .paper-block {
  margin-top: 18px;
  padding: clamp(18px, 3vw, 30px);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--paper-ink);
}

.page-faq .spec-list {
  margin: 0;
  display: grid;
}

.page-faq .spec-item {
  padding: 14px 0;
  border-top: 1px solid rgba(25, 20, 16, 0.16);
}

.page-faq .spec-item:first-child {
  border-top: 0;
  padding-top: 0;
}

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

.page-faq .spec-item dt {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(25, 20, 16, 0.6);
}

.page-faq .spec-item dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(25, 20, 16, 0.88);
}

/* 联系块 */
.page-faq .contact-card {
  margin-top: 18px;
  padding: clamp(18px, 3vw, 28px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deck);
  display: grid;
  gap: 14px;
}

.page-faq .contact-line {
  display: grid;
  gap: 4px;
  margin: 0;
}

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

.page-faq .contact-value {
  font-size: 17px;
  color: var(--white);
  word-break: break-all;
}

.page-faq .contact-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .contact-card p:last-child {
  margin: 0;
}

/* 桌面栅格 */
@media (min-width: 700px) {
  .page-faq .chapter {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 22px;
  }

  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: var(--faq-gap);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-aside) minmax(0, 1fr);
    gap: var(--faq-gap);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    overflow: visible;
    gap: 2px;
  }

  .page-faq .quick-list {
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .quick-link::after,
  .page-faq .toc-link,
  .page-faq .step-list > li,
  .page-faq .faq-card,
  .page-faq .round-chip,
  .page-faq .qa-q {
    transition: none;
  }

  .page-faq .quick-link:hover::after {
    transform: none;
  }
}