.page-faq {
  --faq-line: rgba(39, 53, 111, 0.9);
  --faq-gap: clamp(16px, 2.4vw, 28px);
  --faq-radius: var(--radius-l);
  background: var(--ink-900);
  color: var(--text-050);
  padding-top: clamp(96px, 13vw, 152px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  margin: 0 0 clamp(22px, 4vw, 40px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .breadcrumb li {
  display: inline-flex;
  align-items: center;
  color: var(--gray-400);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--ink-500);
}

.page-faq .breadcrumb a {
  color: var(--gray-200);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .breadcrumb a:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

/* ---------- 页头 ---------- */
.page-faq .faq-head {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  padding-bottom: clamp(30px, 5vw, 54px);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-head__main {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
}

.page-faq .faq-head h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-faq .faq-head .lead {
  max-width: 36em;
  margin: 0;
  color: var(--gray-200);
  font-size: 17px;
  line-height: 1.75;
}

.page-faq .faq-head__side {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-faq .faq-devices {
  width: min(230px, 66%);
  height: auto;
  color: var(--cyan-400);
}

.page-faq .faq-devices rect,
.page-faq .faq-devices line {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
}

.page-faq .faq-devices .faq-devices__fill {
  fill: var(--glass-14);
  stroke: currentColor;
}

.page-faq .faq-head__side .note {
  color: var(--gray-400);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 主体与分类刻度 ---------- */
.page-faq .faq-body {
  padding-top: clamp(30px, 5vw, 56px);
}

.page-faq .faq-tabs {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-tablist {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 0 0 10px;
  border-bottom: 1px solid var(--faq-line);
  scrollbar-width: thin;
}

.page-faq .faq-tab {
  flex: 0 0 auto;
  display: grid;
  gap: 3px;
  padding: 12px 16px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-s);
  color: var(--gray-200);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: color 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-tab__num {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  transition: color 180ms var(--ease);
}

.page-faq .faq-tab__label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.2;
  white-space: nowrap;
}

.page-faq .faq-tab__hint {
  display: none;
  font-size: 13px;
  line-height: 1.5;
  color: var(--gray-400);
}

.page-faq .faq-tab:hover {
  color: var(--text-050);
  background: var(--glass-08);
}

.page-faq .faq-tab[aria-selected="true"] {
  color: var(--text-050);
  background: var(--glass-08);
  border-color: var(--ink-500);
}

.page-faq .faq-tab[aria-selected="true"] .faq-tab__num {
  color: var(--cyan-400);
}

.page-faq .faq-tab:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-faq .faq-panel[hidden] {
  display: none;
}

@media (min-width: 900px) {
  .page-faq .faq-head {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    column-gap: clamp(32px, 6vw, 88px);
  }

  .page-faq .faq-head__side {
    justify-items: end;
    text-align: right;
  }

  .page-faq .faq-tabs {
    grid-template-columns: minmax(0, 236px) minmax(0, 1fr);
    align-items: start;
    column-gap: clamp(28px, 4vw, 64px);
  }

  .page-faq .faq-tablist {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding: 0 0 0 14px;
    border-bottom: 0;
    border-left: 1px solid var(--faq-line);
    position: sticky;
    top: clamp(96px, 12vh, 148px);
  }

  .page-faq .faq-tab {
    position: relative;
    padding: 14px 12px;
    border-radius: var(--radius-s);
  }

  .page-faq .faq-tab::before {
    content: "";
    position: absolute;
    left: -15px;
    top: 24px;
    width: 8px;
    height: 1px;
    background: var(--ink-500);
    transition: width 220ms var(--ease), background-color 220ms var(--ease);
  }

  .page-faq .faq-tab[aria-selected="true"]::before {
    width: 15px;
    background: var(--cyan-400);
  }

  .page-faq .faq-tab__hint {
    display: block;
  }
}

/* ---------- 面板 ---------- */
.page-faq .faq-panel {
  display: grid;
  gap: clamp(22px, 3.4vw, 38px);
  padding: clamp(22px, 3.6vw, 40px);
  background: var(--ink-700);
  border: 1px solid var(--ink-500);
  border-radius: var(--faq-radius);
}

.page-faq .faq-panel:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

.page-faq .faq-panel__head {
  display: grid;
  gap: 8px;
  padding-bottom: clamp(14px, 2vw, 20px);
  border-bottom: 1px solid var(--ink-500);
}

.page-faq .faq-panel__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.page-faq .faq-panel__desc {
  margin: 0;
  color: var(--gray-400);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-panel__intro {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
}

.page-faq .faq-panel__intro .body-text {
  margin: 0;
  color: var(--gray-200);
  font-size: 16px;
  line-height: 1.75;
}

@media (min-width: 760px) {
  .page-faq .faq-panel__intro {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    column-gap: clamp(24px, 4vw, 44px);
  }
}

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

.page-faq .faq-media .media__frame {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--ink-500);
  border-radius: var(--radius-m);
  background: var(--ink-900);
}

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

/* ---------- 问答条目 ---------- */
.page-faq .qa-list {
  display: grid;
}

.page-faq .qa {
  border-top: 1px solid var(--ink-500);
}

.page-faq .qa:last-child {
  border-bottom: 1px solid var(--ink-500);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 14px;
  padding: clamp(14px, 2.2vw, 20px) 2px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.55;
  color: var(--text-050);
  transition: color 180ms var(--ease);
}

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

.page-faq .qa__q:hover {
  color: var(--cyan-400);
}

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-faq .qa__num {
  padding-top: 5px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray-400);
}

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

.page-faq .qa__mark {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan-400);
  transform: translate(-50%, -50%);
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.page-faq .qa__mark::before {
  width: 14px;
  height: 1.5px;
}

.page-faq .qa__mark::after {
  width: 1.5px;
  height: 14px;
}

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

.page-faq .qa__a {
  padding: 0 2px clamp(16px, 2.4vw, 24px);
  color: var(--gray-200);
  font-size: 16px;
  line-height: 1.75;
  animation: faq-reveal 240ms var(--ease) both;
}

.page-faq .qa__a > p {
  margin: 0 0 10px;
}

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

@media (min-width: 640px) {
  .page-faq .qa__a {
    padding-left: calc(3.4em + 14px);
    padding-right: 22px;
  }
}

.page-faq .qa__key {
  font-weight: 700;
  color: var(--text-050);
  box-shadow: inset 0 -2px 0 var(--amber-400);
}

.page-faq .qa__steps {
  counter-reset: qastep;
  display: grid;
  gap: 6px;
  margin: 10px 0 10px;
  padding: 0;
  list-style: none;
}

.page-faq .qa__steps li {
  counter-increment: qastep;
  position: relative;
  padding-left: 32px;
  font-size: 15.5px;
  line-height: 1.7;
}

.page-faq .qa__steps li::before {
  content: counter(qastep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber-400);
  line-height: 2.2;
}

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

/* ---------- 求助区 ---------- */
.page-faq .faq-help {
  margin-top: clamp(44px, 7vw, 84px);
}

.page-faq .faq-help__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(26px, 4vw, 46px);
  background: linear-gradient(152deg, var(--ink-700) 0%, var(--ink-900) 100%);
  border: 1px solid var(--ink-500);
  border-radius: var(--faq-radius);
}

.page-faq .faq-help__text {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-help__text .h2 {
  margin: 0;
}

.page-faq .faq-help__text .body-text {
  margin: 0;
  color: var(--gray-200);
  font-size: 16px;
  line-height: 1.75;
}

.page-faq .faq-help__text .btn {
  justify-self: start;
  margin-top: 6px;
}

.page-faq .faq-help__meta .h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--text-050);
}

.page-faq .faq-help__list {
  counter-reset: helpstep;
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-help__list li {
  counter-increment: helpstep;
  position: relative;
  padding-left: 36px;
  color: var(--gray-200);
  font-size: 15px;
  line-height: 1.7;
}

.page-faq .faq-help__list li::before {
  content: counter(helpstep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--amber-400);
  line-height: 2.1;
}

@media (min-width: 820px) {
  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 延伸入口 ---------- */
.page-faq .faq-more {
  margin-top: clamp(40px, 6vw, 72px);
}

.page-faq .faq-more .h2 {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
}

.page-faq .faq-more__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink-500);
}

.page-faq .faq-more__list li {
  display: grid;
  gap: 6px;
  padding: 16px 2px;
  border-bottom: 1px solid var(--ink-500);
}

.page-faq .faq-more__list a {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 17px;
  color: var(--text-050);
  text-decoration: none;
  transition: color 180ms var(--ease);
}

.page-faq .faq-more__list a:hover,
.page-faq .faq-more__list a:focus-visible {
  color: var(--cyan-400);
}

.page-faq .faq-more__list span {
  color: var(--gray-400);
  font-size: 14px;
  line-height: 1.65;
}

@media (min-width: 760px) {
  .page-faq .faq-more__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-faq .faq-more__list li {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: baseline;
    gap: 14px;
  }

  .page-faq .faq-more__list span {
    font-size: 15px;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__a {
    animation: none;
  }

  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-tab,
  .page-faq .faq-tab__num,
  .page-faq .qa__q,
  .page-faq .breadcrumb a,
  .page-faq .faq-more__list a {
    transition: none;
  }
}