.page-faq {
  --faq-gap: clamp(14px, 2vw, 22px);
  --faq-aside-w: 268px;
  display: block;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- 页头 ---------- */
.page-faq .faq-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(24px, 4vw, 48px) 0 clamp(18px, 3vw, 28px);
}

.page-faq .breadcrumb {
  margin-bottom: 2px;
}

.page-faq .faq-head h1 {
  margin: 0;
  font-size: clamp(30px, 6vw, 58px);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 68ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--mist);
}

.page-faq .faq-figures {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-figures li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-pill);
  background: var(--navy);
}

.page-faq .fig-num {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--cyan);
  line-height: 1;
}

.page-faq .fig-num--lava {
  color: var(--lava);
}

.page-faq .fig-label {
  font-size: 13px;
  color: var(--gray);
}

/* ---------- 顶部横幅 ---------- */
.page-faq .faq-banner {
  position: relative;
  margin: 0 0 clamp(20px, 3vw, 32px);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--steel);
}

.page-faq .faq-banner img {
  display: block;
  width: 100%;
  height: clamp(120px, 22vw, 280px);
  object-fit: cover;
}

.page-faq .faq-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(34, 227, 210, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(34, 227, 210, 0.18) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(circle at 72% 42%, #000 0%, transparent 74%);
  mask-image: radial-gradient(circle at 72% 42%, #000 0%, transparent 74%);
}

/* ---------- 锚点目录条 ---------- */
.page-faq .faq-toc-bar {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-faq .faq-toc {
  list-style: none;
  margin: 0;
  padding: 2px 2px 10px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-toc a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--steel);
  background: var(--navy);
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t-base) var(--ease), color var(--t-base) var(--ease), background var(--t-base) var(--ease);
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  border-color: var(--cyan);
  color: var(--white);
  background: rgba(34, 227, 210, 0.09);
}

.page-faq .toc-count {
  font-size: 12px;
  color: var(--gray);
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-shell {
  display: block;
}

.page-faq .faq-block {
  margin-bottom: clamp(40px, 6vw, 72px);
  scroll-margin-top: 130px;
}

.page-faq .block-head {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--steel);
}

.page-faq .block-head h2 {
  margin: 0;
  font-size: clamp(21px, 3vw, 28px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .block-head p {
  margin: 0;
  max-width: 60ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 示意图 ---------- */
.page-faq .faq-diagram {
  margin: 0 0 18px;
}

.page-faq .faq-diagram img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--steel);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  position: relative;
  margin-bottom: 10px;
  background: var(--navy);
  border: 1px solid var(--steel);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--t-base) var(--ease);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--t-base) var(--ease);
}

.page-faq .qa:hover {
  border-color: #2b5580;
}

.page-faq .qa[open] {
  border-color: rgba(34, 227, 210, 0.5);
}

.page-faq .qa[open]::before {
  transform: scaleY(1);
}

.page-faq .qa-q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--white);
  transition: color var(--t-base) var(--ease);
}

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

.page-faq .qa-q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-faq .qa-index {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
  transition: color var(--t-base) var(--ease);
}

.page-faq .qa[open] .qa-index {
  color: var(--cyan);
}

.page-faq .qa-text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .qa-marker {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: 1px solid var(--steel);
  border-radius: 8px;
  transition: border-color var(--t-base) var(--ease);
}

.page-faq .qa[open] .qa-marker {
  border-color: var(--cyan);
}

.page-faq .qa-marker::before,
.page-faq .qa-marker::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
}

.page-faq .qa-marker::before {
  width: 10px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.page-faq .qa-marker::after {
  width: 2px;
  height: 10px;
  transform: translate(-50%, -50%);
  transition: transform var(--t-base) var(--ease);
}

.page-faq .qa[open] .qa-marker::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .qa-a {
  padding: 0 16px 18px 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.page-faq .qa-a p {
  margin: 0;
}

/* ---------- 步骤胶囊 ---------- */
.page-faq .qa-steps {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq .qa-steps li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px 7px 8px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-pill);
  background: rgba(28, 58, 87, 0.5);
  font-size: 13.5px;
  color: var(--mist);
}

.page-faq .step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--lava);
  color: var(--ink);
  font-size: 11px;
  font-weight: 700;
}

/* ---------- 联络帮助卡 ---------- */
.page-faq .help-card {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--steel);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(28, 58, 87, 0.7), rgba(7, 19, 34, 0.9));
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-faq .help-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(28, 58, 87, 0.9);
}

.page-faq .help-label {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

.page-faq .help-value {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15px;
  color: var(--white);
  word-break: break-all;
}

.page-faq .faq-copy {
  flex: 0 0 auto;
}

.page-faq .help-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 侧栏 ---------- */
.page-faq .faq-aside {
  margin-top: 4px;
}

.page-faq .aside-title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq .cat-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0 0 6px;
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .cat-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-pill);
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color var(--t-base) var(--ease), background var(--t-base) var(--ease), color var(--t-base) var(--ease);
}

.page-faq .cat-item:hover,
.page-faq .cat-item:focus-visible {
  border-color: var(--cyan);
  background: rgba(34, 227, 210, 0.08);
  color: var(--white);
}

.page-faq .cat-count {
  font-size: 12px;
  color: var(--gray);
}

.page-faq .aside-card {
  padding: 16px 18px;
  border: 1px solid var(--steel);
  border-radius: var(--radius-lg);
  background: var(--navy);
}

.page-faq .aside-card-title {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .aside-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .aside-links a {
  display: block;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}

.page-faq .aside-links a:hover,
.page-faq .aside-links a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 980px) {
  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) var(--faq-aside-w);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-body {
    min-width: 0;
  }

  .page-faq .faq-aside {
    position: sticky;
    top: 124px;
    margin-top: 0;
  }

  .page-faq .cat-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 6px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .cat-item {
    width: 100%;
    justify-content: space-between;
    border-color: transparent;
    border-radius: var(--radius-md);
    padding: 10px 14px;
  }

  .page-faq .qa-q {
    padding: 17px 20px;
    font-size: 16px;
  }

  .page-faq .qa-a {
    padding: 0 20px 20px 20px;
  }

  .page-faq .qa-marker {
    width: 24px;
    height: 24px;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-wrap {
    padding: 0 clamp(24px, 3vw, 48px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa::before,
  .page-faq .qa-marker,
  .page-faq .qa-marker::after,
  .page-faq .qa-index,
  .page-faq .faq-toc a,
  .page-faq .cat-item,
  .page-faq .aside-links a {
    transition: none;
  }
}