.page-faq {
  --faq-topic-accent: var(--cyan);
  --faq-gap: clamp(40px, 7vw, 88px);
}

.page-faq .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 26px;
  font-size: 13px;
  color: var(--text-dim);
}

.page-faq .crumbs a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}

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

.page-faq .crumbs__here {
  color: var(--text-soft);
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(22px, 3.5vw, 40px);
}

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

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-size: clamp(29px, 5vw, 50px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--text);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 38em;
  color: var(--text-soft);
  font-size: 16px;
  line-height: 1.85;
}

.page-faq .faq-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-keys a {
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: rgba(13, 21, 48, 0.72);
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  transition: border-color var(--t-fast), color var(--t-fast), background var(--t-fast);
}

.page-faq .faq-keys a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(38, 217, 232, 0.07);
}

.page-faq .faq-stat {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 20px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-faq .faq-stat__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}

.page-faq .faq-stat__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-stat__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 13px;
  color: var(--text-dim);
}

.page-faq .faq-stat__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-stat__item .num {
  font-size: 22px;
  line-height: 1;
}

@media (min-width: 940px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1fr) 304px;
    align-items: start;
  }
}

/* ---------- 区块与图片 ---------- */

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

.page-faq .faq-map,
.page-faq .faq-flow {
  margin: 24px 0 0;
}

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

/* ---------- 五类主题入口 ---------- */

.page-faq .topic-grid {
  display: grid;
  gap: 1px;
  margin-top: 24px;
  background: var(--line);
  border: 1px solid var(--line);
  list-style: none;
}

.page-faq .topic {
  --faq-topic-accent: var(--cyan);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px 20px 24px;
  background: var(--panel);
  border: 0;
  border-left: 2px solid transparent;
  transition: border-color var(--t-fast), background var(--t-fast);
}

.page-faq .topic:hover {
  border-left-color: var(--faq-topic-accent);
  background: #101A3A;
}

.page-faq .topic--download { --faq-topic-accent: var(--cyan); }
.page-faq .topic--adapt { --faq-topic-accent: var(--amber); }
.page-faq .topic--login { --faq-topic-accent: var(--violet); }
.page-faq .topic--switch { --faq-topic-accent: var(--green); }
.page-faq .topic--rollback { --faq-topic-accent: var(--alert); }
.page-faq .topic--help { --faq-topic-accent: var(--text-dim); }

.page-faq .topic__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.page-faq .topic__count {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--faq-topic-accent);
}

.page-faq .topic__title {
  margin: 0;
  font-size: 17px;
  line-height: 1.5;
  color: var(--text);
}

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

.page-faq .topic__list a {
  position: relative;
  display: block;
  padding-left: 14px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--t-fast);
}

.page-faq .topic__list a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 6px;
  height: 1px;
  background: currentColor;
}

.page-faq .topic__list a:hover {
  color: var(--cyan);
}

.page-faq .topic__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

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

.page-faq .topic__jump a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 217, 232, 0.35);
}

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

@media (min-width: 680px) {
  .page-faq .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-faq .topic-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 折叠问答 ---------- */

.page-faq .qa-list {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

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

.page-faq .qa summary {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) 18px;
  gap: 12px;
  align-items: start;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
  transition: background var(--t-fast);
}

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

.page-faq .qa summary:hover {
  background: rgba(38, 217, 232, 0.05);
}

.page-faq .qa__idx {
  font-size: 13px;
  color: var(--text-dim);
  padding-top: 3px;
}

.page-faq .qa__q {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text);
}

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

.page-faq .qa__mark {
  align-self: center;
  width: 8px;
  height: 8px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  transform: rotate(-45deg);
  transition: transform var(--t-mid);
}

.page-faq .qa[open] .qa__mark {
  transform: rotate(45deg);
}

.page-faq .qa__body {
  padding: 0 4px 18px 64px;
}

.page-faq .qa__body p {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* ---------- 时间对照 ---------- */

.page-faq .time-split {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}

.page-faq .time-split__body p {
  margin: 0 0 16px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

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

.page-faq .time-split__link a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 217, 232, 0.35);
}

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

.page-faq .time-split__side {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 4px 14px 10px;
  overflow-x: auto;
}

.page-faq .data-table {
  width: 100%;
  min-width: 260px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-faq .data-table th,
.page-faq .data-table td {
  padding: 12px 8px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
  line-height: 1.72;
}

.page-faq .data-table th {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

.page-faq .data-table td {
  color: var(--text-soft);
}

.page-faq .data-table td:first-child {
  font-family: var(--font-mono);
  color: var(--amber);
  white-space: nowrap;
}

.page-faq .data-table tr:last-child th,
.page-faq .data-table tr:last-child td {
  border-bottom: 0;
}

@media (min-width: 880px) {
  .page-faq .time-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 32px;
    align-items: start;
  }
}

/* ---------- 排查三步 ---------- */

.page-faq .steps {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 20px;
  background: var(--panel);
}

.page-faq .step__no {
  font-size: 22px;
  line-height: 1;
  color: var(--amber);
}

.page-faq .step__title {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .step__desc {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.82;
  color: var(--text-dim);
}

.page-faq .adapt-tail {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-faq .adapt-tail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 217, 232, 0.35);
}

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

/* ---------- 咨询收束 ---------- */

.page-faq .cta-band {
  margin-top: 22px;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  background: linear-gradient(90deg, rgba(38, 217, 232, 0.08), rgba(160, 92, 255, 0.05) 58%, rgba(6, 10, 22, 0) 100%);
  display: grid;
  gap: 22px;
}

.page-faq .cta-band__title {
  margin: 0 0 14px;
  font-size: 20px;
  line-height: 1.5;
  color: var(--text);
}

.page-faq .cta-band__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-soft);
}

.page-faq .cta-band__list li {
  position: relative;
  padding-left: 12px;
}

.page-faq .cta-band__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  background: var(--cyan);
}

.page-faq .cta-band__note {
  margin: 16px 0 0;
  max-width: 48em;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .cta-band .btn {
  justify-self: start;
  text-decoration: none;
}

@media (min-width: 780px) {
  .page-faq .cta-band {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

/* ---------- 窄屏修正 ---------- */

@media (max-width: 600px) {
  .page-faq .qa summary {
    grid-template-columns: 38px minmax(0, 1fr) 16px;
    gap: 8px;
  }

  .page-faq .qa__body {
    padding-left: 0;
  }

  .page-faq .step {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
    padding: 16px;
  }

  .page-faq .faq-stat__item .num {
    font-size: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .topic,
  .page-faq .qa summary,
  .page-faq .qa__mark,
  .page-faq .faq-keys a,
  .page-faq .topic__list a,
  .page-faq .crumbs a {
    transition: none;
  }
}