.page-faq {
  --faq-rail-w: 264px;
  --faq-body-gap: clamp(28px, 4vw, 56px);
  --faq-stream-w: 780px;
  --dot-connect: var(--wave);
  --dot-login: var(--glow);
  --dot-display: var(--gold);
  --dot-audio: var(--red);
  --dot-export: var(--gold-light);
  position: relative;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 64px) 0 clamp(28px, 4vw, 48px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -120px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 16, 46, 0.26), rgba(200, 16, 46, 0) 66%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: -160px;
  bottom: -240px;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 158, 155, 0.2), rgba(46, 158, 155, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-hero .shell {
  position: relative;
}

.page-faq .faq-hero .lead {
  max-width: 40ch;
  margin-top: 18px;
}

.page-faq .faq-figures {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: clamp(20px, 3vw, 28px) 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 22px;
}

.page-faq .faq-figures li {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.page-faq .faq-figures .mono {
  font-size: 21px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: -0.015em;
}

.page-faq .faq-figures em {
  font-style: normal;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-dim);
}

@media (min-width: 800px) {
  .page-faq .faq-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 两栏主体 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-body-gap);
  padding-bottom: clamp(40px, 6vw, 80px);
}

/* ---------- 左侧索引 ---------- */

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

.page-faq .faq-rail__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--glow);
  margin: 0 0 10px;
}

.page-faq .faq-rail__kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}

.page-faq .faq-rail__title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.015em;
  color: var(--paper);
  margin: 0 0 18px;
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  padding-bottom: 6px;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  display: none;
}

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

.page-faq .faq-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  min-width: 148px;
  border: 1px solid var(--line-soft);
  border-left-width: 2px;
  border-radius: 2px;
  background: linear-gradient(140deg, rgba(14, 44, 76, 0.66), rgba(7, 26, 47, 0.4));
  color: var(--text-body);
  text-decoration: none;
  font-size: 14px;
  white-space: nowrap;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  border-color: rgba(232, 179, 59, 0.6);
  color: var(--paper);
  transform: translateY(-2px);
}

.page-faq .faq-rail__no {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-rail__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: 0 0 auto;
}

.page-faq .faq-rail__dot--connect { background: var(--dot-connect); }
.page-faq .faq-rail__dot--login { background: var(--dot-login); }
.page-faq .faq-rail__dot--display { background: var(--dot-display); }
.page-faq .faq-rail__dot--audio { background: var(--dot-audio); }
.page-faq .faq-rail__dot--export { background: var(--dot-export); }

.page-faq .faq-rail__name {
  flex: 1 1 auto;
}

.page-faq .faq-rail__count {
  font-size: 12px;
  color: var(--gold);
}

.page-faq .faq-rail__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-dim);
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-faq .faq-rail__list {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    min-width: 0;
    padding: 13px 12px 13px 0;
    background: none;
    border: 0;
    border-bottom: 1px solid var(--line-soft);
    border-radius: 0;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-bottom-color: var(--gold);
    transform: none;
  }
}

/* ---------- 右侧内容流 ---------- */

.page-faq .faq-stream {
  min-width: 0;
  max-width: var(--faq-stream-w);
}

.page-faq .faq-figure {
  margin: 0 0 clamp(34px, 5vw, 56px);
}

.page-faq .faq-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-block {
  padding-top: clamp(26px, 4vw, 40px);
}

.page-faq .faq-block + .faq-block {
  border-top: 1px solid var(--line-soft);
  margin-top: clamp(36px, 5vw, 60px);
}

.page-faq .faq-block .section-head {
  margin-bottom: clamp(20px, 3vw, 30px);
}

/* ---------- 分组与折叠答案 ---------- */

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 32px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-faq .faq-group:first-of-type {
  margin-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-mid);
  margin-bottom: 16px;
}

.page-faq .faq-group__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  align-self: center;
  box-shadow: 0 0 12px currentColor;
}

.page-faq .faq-group__dot--connect { background: var(--dot-connect); color: var(--dot-connect); }
.page-faq .faq-group__dot--login { background: var(--dot-login); color: var(--dot-login); }
.page-faq .faq-group__dot--display { background: var(--dot-display); color: var(--dot-display); }
.page-faq .faq-group__dot--audio { background: var(--dot-audio); color: var(--dot-audio); }
.page-faq .faq-group__dot--export { background: var(--dot-export); color: var(--dot-export); }

.page-faq .faq-group__head h3 {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
  margin: 0;
}

.page-faq .faq-group__meta {
  font-size: 12px;
  color: var(--mist);
  margin: 0 0 0 auto;
}

.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  background: linear-gradient(150deg, rgba(14, 44, 76, 0.72), rgba(7, 26, 47, 0.5));
  box-shadow: 0 14px 30px -26px rgba(0, 0, 0, 0.95);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item:hover {
  border-color: var(--line-mid);
  transform: translateY(-2px);
}

.page-faq .faq-item[open] {
  border-color: rgba(232, 179, 59, 0.42);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 19px;
  line-height: 1;
  color: var(--gold);
}

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

.page-faq .faq-item summary:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: -3px;
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 4px 18px 20px;
  display: grid;
  gap: 11px;
  border-top: 1px solid var(--line-soft);
  padding-top: 16px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-body);
}

.page-faq .faq-steps .mono {
  font-size: 12px;
  color: var(--glow);
  letter-spacing: 0.04em;
}

/* ---------- 浅色面板：设备与系统适配 ---------- */

.page-faq .faq-paper {
  background: var(--paper);
  color: var(--black);
  border-radius: 2px;
  padding: clamp(22px, 4vw, 42px);
  box-shadow: 0 34px 66px -46px rgba(0, 0, 0, 0.95);
}

.page-faq .faq-paper .eyebrow {
  color: rgba(20, 22, 26, 0.55);
}

.page-faq .faq-paper .eyebrow::before {
  background: var(--red);
}

.page-faq .faq-paper .display-2 {
  color: var(--black);
  margin-top: 10px;
}

.page-faq .faq-device {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-device__figure {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-device__figure img {
  width: 100%;
  height: auto;
  max-width: 260px;
  margin: 0 auto;
  display: block;
  border-radius: 2px;
}

.page-faq .faq-device__svg {
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
  height: auto;
  color: var(--red);
  opacity: 0.85;
}

.page-faq .faq-device__list {
  margin: 0;
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-faq .faq-device__list dt {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 5px;
}

.page-faq .faq-device__list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(20, 22, 26, 0.82);
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(20, 22, 26, 0.12);
}

.page-faq .faq-device__list > div:last-child dd {
  border-bottom: 0;
  padding-bottom: 0;
}

@media (min-width: 720px) {
  .page-faq .faq-device {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
    align-items: start;
  }
}

/* ---------- 反馈材料与响应 ---------- */

.page-faq .faq-lead {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-body);
  max-width: 46ch;
  margin: 0 0 20px;
}

.page-faq .faq-check {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .faq-check li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-body);
  padding: 10px 14px;
  border: 1px solid var(--line-soft);
  border-left: 2px solid rgba(232, 179, 59, 0.5);
  border-radius: 2px;
  background: linear-gradient(120deg, rgba(14, 44, 76, 0.5), rgba(7, 26, 47, 0.28));
}

.page-faq .faq-check .mono {
  font-size: 12px;
  color: var(--gold);
}

.page-faq .faq-respond {
  display: grid;
  gap: 10px;
  padding: clamp(16px, 3vw, 24px);
  border-radius: 2px;
  background: linear-gradient(135deg, rgba(200, 16, 46, 0.16), rgba(46, 158, 155, 0.12));
  border: 1px solid rgba(200, 16, 46, 0.34);
}

.page-faq .faq-respond__item {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-body);
}

.page-faq .faq-respond__item .mono {
  color: var(--gold-light);
  font-size: 13px;
  letter-spacing: 0.03em;
}

.page-faq .faq-respond__item a {
  color: var(--glow);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mid);
}

.page-faq .faq-respond__item a:hover {
  border-bottom-color: var(--gold);
}

.page-faq .faq-respond__more {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .faq-respond__more a {
  color: var(--glow);
  text-decoration: none;
  border-bottom: 1px solid var(--line-mid);
}

.page-faq .faq-respond__more a:hover {
  border-bottom-color: var(--gold);
}

/* ---------- 导出疑问 ---------- */

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

.page-faq .faq-export__card {
  padding: 18px 18px 20px;
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  background: linear-gradient(160deg, rgba(14, 44, 76, 0.66), rgba(7, 26, 47, 0.42));
  border-top: 2px solid rgba(46, 158, 155, 0.55);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-faq .faq-export__card:hover {
  border-color: rgba(232, 179, 59, 0.42);
  border-top-color: var(--gold);
  transform: translateY(-3px);
}

.page-faq .faq-export__card h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-faq .faq-export__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-body);
}

@media (min-width: 760px) {
  .page-faq .faq-export {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }
}

/* ---------- 底部双入口 ---------- */

.page-faq .faq-dual {
  border-top: 1px solid var(--line-mid);
  padding: clamp(30px, 5vw, 56px) 0 clamp(44px, 6vw, 72px);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-dual::before {
  content: "";
  position: absolute;
  right: -180px;
  bottom: -220px;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 179, 59, 0.14), rgba(232, 179, 59, 0) 68%);
  pointer-events: none;
}

.page-faq .faq-dual__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-faq .faq-dual__card {
  display: grid;
  gap: 8px;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line-mid);
  border-radius: 2px;
  background: linear-gradient(140deg, rgba(14, 44, 76, 0.86), rgba(7, 26, 47, 0.56));
  text-decoration: none;
  color: var(--paper);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-faq .faq-dual__card:hover,
.page-faq .faq-dual__card:focus-visible {
  transform: translateY(-4px);
}

.page-faq .faq-dual__card--feedback {
  border-color: rgba(200, 16, 46, 0.5);
  background: linear-gradient(140deg, rgba(200, 16, 46, 0.2), rgba(7, 26, 47, 0.6));
}

.page-faq .faq-dual__card--feedback:hover {
  border-color: var(--gold);
}

.page-faq .faq-dual__card--export {
  border-color: rgba(232, 179, 59, 0.46);
  background: linear-gradient(140deg, rgba(232, 179, 59, 0.15), rgba(46, 158, 155, 0.12));
}

.page-faq .faq-dual__card--export:hover {
  border-color: var(--glow);
}

.page-faq .faq-dual__tag {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--glow);
}

.page-faq .faq-dual__card strong {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-faq .faq-dual__card span:last-child {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-body);
}

@media (min-width: 820px) {
  .page-faq .faq-dual__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}