.page-faq {
  --faq-accent-silver: #B0BEC5;
  --faq-line: #2A3833;
  --faq-index-width: 250px;
  background-color: var(--color-pitch);
  color: var(--color-white);
  padding-bottom: 6rem;
  overflow-x: hidden;
}

/* 面包屑 */
.page-faq .breadcrumb {
  padding-top: 1.25rem;
  padding-bottom: 1rem;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  font-size: .78rem;
  letter-spacing: .06em;
}

.page-faq .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: .5rem;
  color: var(--color-silver);
  opacity: .5;
}

.page-faq .breadcrumb__link {
  color: var(--color-silver);
  text-decoration: none;
  transition: color .2s;
}

.page-faq .breadcrumb__link:hover {
  color: var(--color-white);
}

.page-faq .breadcrumb__current {
  color: var(--color-green);
  font-weight: 600;
}

/* 页面头区 */
.page-faq .page-head {
  position: relative;
  padding-top: 4.5rem;
  padding-bottom: 3.5rem;
}

.page-faq .page-head::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 28%;
  height: 4px;
  background: linear-gradient(90deg, transparent, var(--color-green) 40%, var(--color-red));
  transform: skewX(-20deg);
  transform-origin: left bottom;
}

.page-faq .page-kicker {
  margin: 0 0 .875rem;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--color-green);
}

.page-faq .page-kicker::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--color-red);
  vertical-align: middle;
  margin-right: .5rem;
}

.page-faq .page-title {
  position: relative;
  margin: 0 0 1.5rem;
  padding-left: 1.25rem;
  font-family: var(--font-head);
  font-size: clamp(2.1rem, 5.5vw, 4rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -.02em;
}

.page-faq .page-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: .15em;
  bottom: .15em;
  width: .4rem;
  background: linear-gradient(180deg, var(--color-green) 0%, var(--color-red) 100%);
}

.page-faq .page-title em {
  font-style: italic;
  color: var(--color-green);
}

.page-faq .page-lead {
  max-width: 68ch;
  margin: 0;
  color: var(--color-gray);
  font-size: 1rem;
  line-height: 1.8;
}

/* 快速分类跳转 */
.page-faq .faq-jump {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .625rem;
  margin-bottom: 4rem;
}

.page-faq .faq-jump__link {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1rem 1.1rem;
  background: var(--color-card);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--color-silver);
  text-decoration: none;
  color: var(--color-white);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 100%, 10px 100%);
  transition: background-color .2s, transform .2s, border-color .2s;
}

.page-faq .faq-jump__link--subscribe { border-left-color: var(--color-green); }
.page-faq .faq-jump__link--data { border-left-color: var(--faq-accent-silver); }
.page-faq .faq-jump__link--feedback { border-left-color: var(--color-red); }
.page-faq .faq-jump__link--device { border-left-color: var(--color-yellow); }

.page-faq .faq-jump__link:hover {
  transform: translateY(-3px);
  background: #24332b;
}

.page-faq .faq-jump__idx {
  font-family: var(--font-num);
  font-style: italic;
  font-size: 1.3rem;
  line-height: 1;
  color: var(--faq-accent-silver);
}

.page-faq .faq-jump__link--subscribe .faq-jump__idx { color: var(--color-green); }
.page-faq .faq-jump__link--feedback .faq-jump__idx { color: var(--color-red); }
.page-faq .faq-jump__link--device .faq-jump__idx { color: var(--color-yellow); }

.page-faq .faq-jump__label {
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .04em;
}

/* 主导航布局 */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.5rem;
  margin-bottom: 4.5rem;
}

/* 左侧分类索引 */
.page-faq .faq-index {
  position: relative;
  padding: 1.25rem;
  background: rgba(30, 42, 38, .6);
  border-top: 3px solid var(--color-green);
  box-shadow: var(--shadow);
}

.page-faq .faq-index__title {
  margin: 0 0 1rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--faq-line);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--color-silver);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index__link {
  position: relative;
  display: block;
  padding: .8rem .9rem;
  font-size: .9rem;
  font-weight: 600;
  color: var(--color-white);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: border-color .2s, background-color .2s, padding-left .2s;
}

.page-faq .faq-index__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 6px;
  background: var(--color-red);
  transform: translateY(-50%) scale(0);
  transition: transform .2s;
}

.page-faq .faq-index__link:hover {
  padding-left: 1.3rem;
  border-left-color: var(--color-green);
  background: var(--color-card);
}

.page-faq .faq-index__link:hover::before {
  transform: translateY(-50%) scale(1);
}

.page-faq .faq-index__note {
  margin: 1.5rem 0 0;
  padding: .875rem;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--color-gray);
  background: var(--color-card);
  border-right: 3px solid var(--color-red);
}

.page-faq .faq-index__note strong {
  color: var(--color-green);
}

/* 右侧问答容器 */
.page-faq .faq-content {
  min-width: 0;
}

.page-faq .faq-section {
  position: relative;
  margin-bottom: 3.75rem;
  padding-top: 1.75rem;
  border-top: 3px solid var(--faq-line);
}

.page-faq .faq-section::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  height: 3px;
  width: 72px;
  background: var(--color-green);
  transform: skewX(-30deg);
}

.page-faq .faq-section--data::before { background: var(--faq-accent-silver); }
.page-faq .faq-section--feedback::before { background: var(--color-red); }
.page-faq .faq-section--device::before { background: var(--color-yellow); }

.page-faq .faq-section__title {
  margin: 0 0 .5rem;
  font-family: var(--font-head);
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -.01em;
}

.page-faq .faq-section__desc {
  margin: 0 0 1.75rem;
  color: var(--color-gray);
  font-size: .92rem;
  line-height: 1.7;
}

/* 手风琴 */
.page-faq .faq-qa {
  margin-bottom: .875rem;
  background: var(--color-card);
  border: 1px solid var(--faq-line);
  transition: border-color .2s, background-color .2s;
}

.page-faq .faq-qa[open] {
  border-color: var(--color-green);
  background: #24322d;
}

.page-faq .faq-qa__q {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.05rem 1.25rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

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

.page-faq .faq-qa__q:hover {
  background: rgba(255, 255, 255, .03);
}

.page-faq .faq-qa__idx {
  font-family: var(--font-num);
  font-style: italic;
  font-size: 1rem;
  line-height: 1;
  color: var(--faq-accent-silver);
  min-width: 2.5ch;
}

.page-faq .faq-qa__text {
  flex: 1;
  font-size: .95rem;
  font-weight: 700;
  line-height: 1.4;
}

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

.page-faq .faq-qa__icon {
  position: relative;
  flex: 0 0 auto;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-green);
  border-bottom: 2px solid var(--color-green);
  transform: rotate(45deg);
  transition: transform .25s ease;
}

.page-faq .faq-qa[open] .faq-qa__icon {
  transform: rotate(225deg) translate(2px, 2px);
}

.page-faq .faq-qa__a {
  padding: 0 1.25rem 1.25rem 4rem;
  color: var(--color-gray);
  font-size: .92rem;
  line-height: 1.8;
}

.page-faq .faq-qa__a p {
  margin: 0 0 .75rem;
}

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

.page-faq .faq-link {
  color: var(--color-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 230, 118, .35);
  transition: border-color .2s, color .2s;
}

.page-faq .faq-link:hover {
  color: var(--color-white);
  border-bottom-color: var(--color-white);
}

/* 插图 */
.page-faq .faq-figure {
  margin: 1.75rem 0 0;
  padding: .875rem;
  background: var(--color-card);
  border: 1px solid var(--faq-line);
  border-top: 3px solid var(--faq-accent-silver);
}

.page-faq .faq-figure--wide {
  border-top-color: var(--color-green);
}

.page-faq .faq-figure--narrow {
  border-top-color: var(--color-red);
}

.page-faq .faq-figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--faq-line);
}

.page-faq .faq-figure__caption {
  margin-top: .75rem;
  padding: .25rem .5rem;
  font-size: .78rem;
  color: var(--color-gray);
  text-align: center;
  letter-spacing: .04em;
}

/* 底部帮助区 */
.page-faq .faq-help {
  position: relative;
  margin-top: 2rem;
  padding: 2.25rem 1.75rem;
  background: linear-gradient(135deg, #1E2A26 0%, #0B1210 90%);
  border-top: 3px solid var(--color-green);
  border-bottom: 3px solid var(--color-red);
  overflow: hidden;
}

.page-faq .faq-help::before {
  content: "?";
  position: absolute;
  right: -0.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-num);
  font-style: italic;
  font-weight: 900;
  font-size: clamp(5rem, 12vw, 9rem);
  line-height: 1;
  color: rgba(0, 230, 118, .08);
  pointer-events: none;
}

.page-faq .faq-help::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: 64px solid var(--color-red);
  border-left: 64px solid transparent;
}

.page-faq .faq-help__title {
  position: relative;
  margin: 0 0 .75rem;
  font-family: var(--font-head);
  font-size: 1.5rem;
  font-weight: 800;
  z-index: 1;
}

.page-faq .faq-help__text {
  position: relative;
  max-width: 55ch;
  margin: 0 0 1.5rem;
  color: var(--color-gray);
  font-size: .92rem;
  line-height: 1.7;
  z-index: 1;
}

.page-faq .faq-help__actions {
  position: relative;
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  gap: .75rem;
  z-index: 1;
}

@media (max-width: 767px) {
  .page-faq .faq-index__list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .25rem .5rem;
  }

  .page-faq .faq-index__note {
    margin-top: 1rem;
  }
}

@media (min-width: 768px) {
  .page-faq .faq-jump {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-faq .faq-figure--wide {
    max-width: 620px;
  }

  .page-faq .faq-figure--narrow {
    max-width: 520px;
  }

  .page-faq .faq-help__actions {
    flex-direction: row;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-width) minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 6.5rem;
  }
}