.page-faq {
  --faq-text: #17231F;
  --faq-muted: #55635E;
  --faq-line-on-paper: rgba(42, 54, 52, .18);
  --faq-idx-w: 210px;
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding: 26px 0 34px;
}

.page-faq .faq-hero__body {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-size: clamp(30px, 7.4vw, 52px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 14px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: #C3D2CD;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-hero__panel {
  position: relative;
  overflow: hidden;
  padding: 20px 20px 18px;
  border: 1px solid rgba(46, 242, 200, .18);
  border-radius: var(--r-xl);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(46, 242, 200, .16), transparent 62%),
    linear-gradient(150deg, #0E1614 0%, #0F3D2F 100%);
}

.page-faq .faq-hero__panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(46, 242, 200, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 242, 200, .06) 1px, transparent 1px);
  background-size: 26px 26px;
}

.page-faq .faq-hero__panel-cap {
  position: relative;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-hero__stats {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-faq .faq-hero__stats .stat {
  display: block;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(46, 242, 200, .14);
}

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

.page-faq .faq-hero__stats .stat__value {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-hero__stats .stat__unit {
  margin-left: 4px;
  font-size: 14px;
  color: var(--cyan);
}

.page-faq .faq-hero__stats .stat__label {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.6;
  color: #9FB3AD;
}

/* ============ 主题筛选 ============ */
.page-faq .faq-filter {
  padding: 15px 0;
}

.page-faq .faq-filter .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-start;
}

/* ============ 问答主体区 ============ */
.page-faq .faq-body {
  padding-top: 40px;
  padding-bottom: 56px;
}

.page-faq .qa-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  min-width: 0;
}

/* 左侧分类索引 */
.page-faq .qa-index {
  min-width: 0;
}

.page-faq .qa-index__cap {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan-deep);
}

.page-faq .qa-index__list {
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .qa-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--faq-line-on-paper);
  border-radius: 999px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--faq-text);
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .qa-index__link:hover,
.page-faq .qa-index__link:focus-visible {
  background: rgba(15, 61, 47, .08);
  border-color: var(--green-2);
}

.page-faq .qa-index__n {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--flame);
}

/* 问题分组 */
.page-faq .qa-group {
  margin: 0 0 46px;
  scroll-margin-top: calc(var(--frame-top-h) + 24px);
}

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

.page-faq .qa-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--ink);
}

.page-faq .qa-group__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--flame);
}

.page-faq .qa-group__title {
  margin: 0;
  font-size: clamp(21px, 3.6vw, 27px);
  letter-spacing: -.01em;
  color: var(--faq-text);
}

.page-faq .qa-group__desc {
  flex: 1 1 100%;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--faq-muted);
}

/* 单条问答 */
.page-faq .qa {
  position: relative;
  border-bottom: 1px solid var(--faq-line-on-paper);
}

.page-faq .qa__q {
  position: relative;
  display: block;
  padding: 18px 46px 18px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--faq-text);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .qa__q::marker {
  content: "";
}

.page-faq .qa__q:hover {
  color: var(--green-2);
}

.page-faq .qa__q::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1;
  color: var(--flame);
}

.page-faq .qa[open] > .qa__q::after {
  content: "\2212";
}

.page-faq .qa__idx {
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--flame);
}

.page-faq .qa__a {
  padding: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-text);
}

.page-faq .qa__a p {
  margin: 0 0 10px;
  max-width: 66ch;
}

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

.page-faq .qa__a a {
  color: var(--cyan-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__figure {
  margin: 16px 0 6px;
  max-width: 540px;
}

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

.page-faq .qa-takeaway {
  margin: 18px 0 0;
  padding: 14px 18px;
  background: rgba(15, 61, 47, .07);
  border-left: 4px solid var(--flame);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--faq-text);
}

/* ============ 排查清单 ============ */
.page-faq .faq-check {
  margin: 0 0 54px;
  padding: 26px 20px 24px;
  border-radius: var(--r-xl);
  background: var(--ink-2);
  border: 1px solid var(--line);
  scroll-margin-top: calc(var(--frame-top-h) + 24px);
}

.page-faq .faq-check__title {
  margin: 8px 0 0;
  font-size: clamp(22px, 4.2vw, 30px);
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-faq .faq-check__desc {
  margin: 10px 0 18px;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: #A9BCB6;
}

.page-faq .check-list {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .check-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  box-sizing: border-box;
  padding: 12px 14px;
  background: rgba(242, 246, 244, .03);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  color: #D8E4E0;
  font: inherit;
  font-size: 14.5px;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .check-row:hover {
  border-color: var(--green-2);
}

.page-faq .check-row__box {
  position: relative;
  flex: 0 0 15px;
  width: 15px;
  height: 15px;
  margin-top: 3px;
  border: 2px solid var(--gray);
  border-radius: 4px;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .check-row[aria-pressed="true"] {
  border-color: rgba(46, 242, 200, .5);
  background: rgba(46, 242, 200, .07);
}

.page-faq .check-row[aria-pressed="true"] .check-row__box {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .check-row[aria-pressed="true"] .check-row__box::after {
  content: "";
  position: absolute;
  left: 3px;
  top: -2px;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(45deg);
}

.page-faq .faq-check__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

/* ============ 联系支持 ============ */
.page-faq .faq-support {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  padding-top: 6px;
  scroll-margin-top: calc(var(--frame-top-h) + 24px);
}

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

.page-faq .faq-support__body .section-title {
  color: var(--faq-text);
}

.page-faq .faq-support__body p {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--faq-text);
}

.page-faq .faq-support__body a {
  color: var(--cyan-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-support__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-faq .faq-support__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--faq-text);
}

.page-faq .faq-support__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--cyan);
}

.page-faq .faq-support__note {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 3px solid var(--green-2);
  font-size: 14px;
  line-height: 1.8;
  color: var(--faq-muted);
}

.page-faq .faq-support__more {
  margin-top: 18px;
}

.page-faq .faq-support__contact {
  align-self: start;
  padding: 20px;
  border: 1px solid var(--faq-line-on-paper);
  border-radius: var(--r-lg);
  background: rgba(15, 61, 47, .05);
}

.page-faq .contact-list {
  margin: 0;
  display: grid;
}

.page-faq .contact-list__row {
  display: grid;
  gap: 5px;
  padding: 12px 0;
  border-bottom: 1px solid var(--faq-line-on-paper);
}

.page-faq .contact-list__row:first-child {
  padding-top: 0;
}

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

.page-faq .contact-list__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan-deep);
}

.page-faq .contact-list__v {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--faq-text);
  word-break: break-word;
}

.page-faq .contact-list__v--text {
  line-height: 1.75;
}

/* ============ 响应式 ============ */
@media (min-width: 760px) {
  .page-faq .qa {
    padding-left: 88px;
  }

  .page-faq .qa__q {
    padding-top: 22px;
    font-size: 18px;
  }

  .page-faq .qa__idx {
    position: absolute;
    left: -88px;
    top: 22px;
    margin: 0;
    font-size: 30px;
    line-height: 1;
    letter-spacing: -.03em;
    color: var(--cyan-deep);
    opacity: .62;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-support {
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr);
    gap: 46px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr);
    gap: 56px;
    align-items: end;
    padding: 54px 0 60px;
  }
}

@media (min-width: 980px) {
  .page-faq .qa-layout {
    grid-template-columns: var(--faq-idx-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .qa-index {
    position: sticky;
    top: calc(var(--frame-top-h) + 18px);
    padding-left: 16px;
    border-left: 2px solid var(--green);
  }

  .page-faq .qa-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .qa-index__list li {
    flex: none;
  }

  .page-faq .qa-index__link {
    display: flex;
    padding: 9px 8px;
    border: 0;
    border-radius: var(--r-sm);
    white-space: normal;
    line-height: 1.45;
  }
}

@media (max-width: 719px) {
  .page-faq .faq-check {
    padding: 22px 16px;
    border-radius: var(--r-lg);
  }

  .page-faq .qa-takeaway {
    padding: 12px 14px;
  }
}

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