.page-faq {
  --faq-rail: 272px;
  --faq-cut: 16px;
  --faq-gap: clamp(22px, 3.4vw, 44px);
  --faq-sticky: 96px;
}

.page-faq .page-faq__crumbs {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.4vw, 56px) 0 clamp(32px, 4.8vw, 60px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(88% 118% at 92% -12%, rgba(80, 242, 206, 0.16), transparent 58%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 74%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--teal-line) 42%, transparent 88%);
  opacity: 0.85;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(24px, 3.6vw, 40px);
  align-items: center;
}

.page-faq .display-title {
  margin: 0 0 16px;
  font-size: clamp(2.2rem, 6.2vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 15ch;
}

.page-faq .lede {
  margin: 0 0 24px;
  max-width: 40ch;
  color: var(--paper-dim);
  line-height: 1.85;
}

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

.page-faq .faq-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-faq .faq-hero__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .media-frame__caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  background: rgba(5, 26, 21, 0.86);
}

/* ---------- 双栏主体 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(30px, 5vw, 60px) 0 clamp(44px, 6vw, 84px);
}

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

.page-faq .faq-rail {
  display: grid;
  gap: 16px;
}

/* 版本徽章 */
.page-faq .faq-badge {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  background: var(--ink-800);
  border: 1px solid var(--teal-line);
  clip-path: polygon(
    0 0,
    calc(100% - var(--faq-cut)) 0,
    100% var(--faq-cut),
    100% 100%,
    var(--faq-cut) 100%,
    0 calc(100% - var(--faq-cut))
  );
}

.page-faq .faq-badge__label {
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-badge__num {
  font-size: 1.7rem;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

/* 索引导航 */
.page-faq .faq-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 14px;
  border: 1px solid var(--line-soft);
  color: var(--paper-dim);
  font-size: 0.86rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-index__link .mono {
  color: var(--teal-line);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  background: var(--ink-800);
  outline: none;
}

.page-faq .faq-index__link:hover .mono,
.page-faq .faq-index__link:focus-visible .mono {
  color: var(--cyan);
}

/* 关键数字 */
.page-faq .faq-stats {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-stats__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: var(--ink-800);
}

.page-faq .faq-stats__key {
  font-size: 0.82rem;
  color: var(--mist);
}

.page-faq .faq-stats__val {
  font-size: 0.92rem;
  color: var(--cyan);
  letter-spacing: 0.02em;
}

/* ---------- 右栏章节 ---------- */
.page-faq .faq-main {
  display: grid;
  gap: 0;
}

.page-faq .faq-section {
  padding: clamp(26px, 4vw, 42px) 0;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-section--last {
  padding-bottom: 0;
}

.page-faq .faq-section__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}

.page-faq .faq-section__num {
  flex: 0 0 auto;
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-top: 2px;
}

.page-faq .faq-section .section-title {
  margin: 0;
  font-size: clamp(1.35rem, 3.4vw, 1.9rem);
  line-height: 1.32;
  color: var(--paper);
}

/* 规格表 */
.page-faq .faq-spec {
  display: grid;
  gap: 1px;
  margin: 0;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-faq .faq-spec__row {
  background: var(--ink-800);
  padding: 14px 16px;
  display: grid;
  gap: 6px;
}

.page-faq .faq-spec dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .faq-spec dd {
  margin: 0;
  color: var(--paper);
  font-size: 0.95rem;
  line-height: 1.7;
}

.page-faq .faq-spec__row .mono {
  color: var(--cyan);
  font-size: 1.05rem;
}

/* 评测表 */
.page-faq .faq-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .faq-table {
  width: 100%;
  min-width: 500px;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.page-faq .faq-table th,
.page-faq .faq-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-table thead th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--mist);
  background: var(--ink-700);
  white-space: nowrap;
}

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

.page-faq .faq-table tbody tr:hover td {
  background: var(--ink-700);
}

.page-faq .faq-table__dim {
  color: var(--paper);
  font-weight: 600;
  white-space: nowrap;
}

.page-faq .faq-table td:nth-child(2) {
  color: var(--paper-dim);
}

.page-faq .faq-table__result {
  color: var(--paper-dim);
  line-height: 1.65;
}

.page-faq .faq-num {
  color: var(--cyan);
  font-size: 1.05rem;
  padding: 0 2px;
  box-shadow: inset 0 -2px 0 rgba(80, 242, 206, 0.4);
}

.page-faq .note {
  margin: 12px 0 0;
  color: var(--mist);
  font-size: 0.82rem;
  line-height: 1.7;
}

/* ---------- 手风琴 ---------- */
.page-faq .qa {
  position: relative;
  margin-bottom: 10px;
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

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

.page-faq .qa[open] {
  background: var(--ink-700);
  border-color: var(--line);
}

.page-faq .qa[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: repeating-linear-gradient(
    180deg,
    var(--cyan) 0 7px,
    transparent 7px 14px
  );
}

.page-faq .qa__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

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

.page-faq .qa__q {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .qa__icon {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
}

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

.page-faq .qa__icon::before {
  width: 14px;
  height: 2px;
}

.page-faq .qa__icon::after {
  width: 2px;
  height: 14px;
  transition: transform 0.24s var(--ease), opacity 0.24s var(--ease);
}

.page-faq .qa[open] .qa__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 16px 16px;
  color: var(--paper-dim);
  font-size: 0.94rem;
  line-height: 1.8;
}

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

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

/* ---------- 弱网分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 22px;
}

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

.page-faq .faq-split__media {
  margin: 0;
  align-self: start;
  border: 1px solid var(--line);
  background: var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.page-faq .faq-split__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-support {
  display: grid;
  gap: 16px;
}

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

.page-faq .faq-support__card .panel__title {
  margin: 0;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-faq .faq-support__text {
  margin: 0;
  color: var(--paper-dim);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .faq-support__card .btn {
  justify-self: start;
  margin-top: 4px;
}

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

.page-faq .faq-support__list li {
  position: relative;
  padding-left: 20px;
  color: var(--paper-dim);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-faq .faq-support__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 2px;
  background: var(--cyan);
}

.page-faq .faq-support__list .mono {
  color: var(--cyan);
}

/* ---------- 中等屏 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-spec {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-spec__row--wide {
    grid-column: 1 / -1;
  }

  .page-faq .faq-support {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 780px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: 26px;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: stretch;
  }

  .page-faq .faq-hero__media {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    align-items: start;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: var(--faq-sticky);
    align-self: start;
  }

  .page-faq .faq-index {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 0;
  }

  .page-faq .faq-index__link {
    min-height: 44px;
    padding: 11px 12px;
    border: 0;
    border-bottom: 1px solid var(--line-soft);
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: transparent;
    border-left-color: var(--cyan);
    border-bottom-color: var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__icon::after,
  .page-faq .qa,
  .page-faq .faq-index__link {
    transition: none;
  }
}