.page-faq {
  --faq-gap: clamp(30px, 5vw, 64px);
  --faq-red-rule: 3px;
  position: relative;
  padding-bottom: clamp(60px, 8vw, 112px);
  color: var(--silver);
  background: var(--ink);
}

.page-faq .breadcrumb {
  padding-top: clamp(16px, 3vw, 28px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--slate);
}

.page-faq .breadcrumb li + li::before {
  content: "/";
  margin: 0 8px;
  color: var(--line-strong);
}

.page-faq .breadcrumb a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--green);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 56px);
  padding: clamp(26px, 4vw, 52px) 0 clamp(28px, 4vw, 48px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: clamp(8px, 2vw, 20px);
  right: -6%;
  width: min(46vw, 460px);
  height: 140px;
  background: linear-gradient(100deg, rgba(255, 59, 47, 0.14), rgba(46, 125, 255, 0.08) 55%, transparent 85%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__copy {
  position: relative;
  z-index: 1;
  border-left: var(--faq-red-rule) solid var(--red);
  padding-left: clamp(16px, 2.6vw, 30px);
}

.page-faq .faq-hero__copy h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--silver);
}

.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 46ch;
  font-size: clamp(15.5px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-hero__stats {
  display: flex;
  flex-wrap: wrap;
  margin: 30px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__stats > div {
  flex: 1 1 118px;
  padding: 14px 16px 14px 0;
  border-right: 1px solid var(--line);
}

.page-faq .faq-hero__stats > div:last-child {
  border-right: 0;
}

.page-faq .faq-hero__stats dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-faq .faq-hero__stats dd {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.6vw, 1.85rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--silver);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

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

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

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

.page-faq .media-cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--slate);
}

/* ---------- 筛选台 ---------- */

.page-faq .faq-deck {
  margin-top: var(--faq-gap);
}

.page-faq .faq-deck__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-deck__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.4vw, 1.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--silver);
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-faq .filter-bar__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-faq .chip {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .chip[aria-pressed="true"] {
  color: var(--ink);
  background: var(--green);
  border-color: var(--green);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding-top: clamp(30px, 4.6vw, 54px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(20px, 3vw, 36px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px 16px;
  align-items: start;
  padding-left: 16px;
  border-left: var(--faq-red-rule) solid var(--red);
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-faq .faq-group__key {
  padding-top: 6px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--red);
}

.page-faq .faq-group__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 2rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--silver);
}

.page-faq .faq-group__note {
  margin: 8px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 进来之前三件事 ---------- */

.page-faq .prep-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .prep-item {
  background: var(--graphite);
  padding: clamp(20px, 3vw, 28px);
}

.page-faq .prep-item__num {
  display: inline-block;
  margin-bottom: 14px;
  padding: 2px 7px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--green);
  border: 1px solid rgba(134, 255, 110, 0.35);
}

.page-faq .prep-item h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--silver);
}

.page-faq .prep-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 折叠问答 ---------- */

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

.page-faq .qa {
  border-bottom: 1px solid var(--line);
  border-left: var(--faq-red-rule) solid transparent;
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-faq .qa[open] {
  border-left-color: var(--red);
  background: linear-gradient(90deg, rgba(255, 59, 47, 0.06), transparent 58%);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 17px 14px 17px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--silver);
  transition: color 0.2s var(--ease);
}

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

.page-faq .qa summary:hover {
  color: #ffffff;
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: -2px;
}

.page-faq .qa__q {
  display: block;
  min-width: 0;
}

.page-faq .qa__marker {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
  margin-top: 3px;
  border: 1px solid var(--line-strong);
}

.page-faq .qa__marker::before,
.page-faq .qa__marker::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 4px;
  right: 4px;
  height: 1px;
  background: var(--blue);
}

.page-faq .qa__marker::after {
  transform: rotate(90deg);
  transition: transform 0.24s var(--ease);
}

.page-faq .qa[open] .qa__marker::after {
  transform: rotate(0deg);
}

.page-faq .qa[open] .qa__marker::before,
.page-faq .qa[open] .qa__marker::after {
  background: var(--red);
}

.page-faq .qa__body {
  max-width: 68ch;
  padding: 2px 14px 22px 16px;
  animation: faq-unfold 0.26s var(--ease) both;
}

.page-faq .qa__body p {
  margin: 0 0 10px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--slate);
}

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

.page-faq .qa__body a {
  color: var(--blue);
}

@keyframes faq-unfold {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 换设备四步 ---------- */

.page-faq .migrate-track {
  display: grid;
  gap: 0;
  margin: 0 0 clamp(24px, 3.4vw, 36px);
  padding: 0;
  list-style: none;
}

.page-faq .migrate-step {
  position: relative;
  padding: 16px 0 16px 22px;
  border-left: 1px solid var(--line);
}

.page-faq .migrate-step::before {
  content: "";
  position: absolute;
  left: -3.5px;
  top: 22px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}

.page-faq .migrate-step--last::before {
  background: var(--red);
}

.page-faq .migrate-step__num {
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--blue);
}

.page-faq .migrate-step--last .migrate-step__num {
  color: var(--red);
}

.page-faq .migrate-step h3 {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--silver);
}

.page-faq .migrate-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 打开异常 ---------- */

.page-faq .trouble-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.6vw, 40px);
  align-items: start;
}

.page-faq .faq-trouble__figure .media-frame {
  border-color: var(--line-strong);
}

/* ---------- 收尾引导 ---------- */

.page-faq .faq-handoff {
  position: relative;
  margin-top: clamp(44px, 6vw, 80px);
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line-strong);
  border-left: var(--faq-red-rule) solid var(--red);
  background:
    linear-gradient(135deg, rgba(46, 125, 255, 0.12), rgba(255, 59, 47, 0.07) 62%, transparent 92%),
    var(--graphite);
}

.page-faq .faq-handoff h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.8vw, 1.95rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--silver);
}

.page-faq .faq-handoff__lead {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-faq .faq-handoff__prep {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: handoff;
}

.page-faq .faq-handoff__prep li {
  position: relative;
  padding-left: 30px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--silver);
  counter-increment: handoff;
}

.page-faq .faq-handoff__prep li::before {
  content: counter(handoff, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--green);
}

.page-faq .faq-handoff .btn {
  margin-top: 28px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-faq .prep-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: end;
    gap: clamp(36px, 5vw, 68px);
  }

  .page-faq .trouble-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  }
}

@media (min-width: 980px) {
  .page-faq .migrate-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .migrate-step {
    padding: 16px 18px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
    margin-right: 18px;
  }

  .page-faq .migrate-step:last-child {
    margin-right: 0;
  }

  .page-faq .migrate-step::before {
    left: 0;
    top: -3.5px;
  }
}

@media (max-width: 600px) {
  .page-faq .faq-hero::before {
    width: 76vw;
    height: 108px;
    right: -12%;
  }

  .page-faq .faq-hero__stats > div {
    flex: 1 1 46%;
    padding-right: 12px;
  }

  .page-faq .qa summary {
    font-size: 15px;
    padding: 15px 12px 15px 14px;
  }

  .page-faq .qa__body {
    padding: 2px 12px 20px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__body {
    animation: none;
  }

  .page-faq .qa,
  .page-faq .qa__marker::after,
  .page-faq .chip,
  .page-faq .breadcrumb a {
    transition: none;
  }
}