.page-faq {
  --f-headline-cn: 'Impact', 'Arial Narrow', 'Arial Black', 'Microsoft YaHei', 'PingFang SC', 'Noto Sans SC', sans-serif;
  --faq-space: clamp(24px, 5vw, 64px);
  background:
    linear-gradient(rgba(10, 31, 68, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 31, 68, 0.03) 1px, transparent 1px),
    var(--c-mist);
  background-size: 44px 44px;
  padding-bottom: clamp(24px, 5vw, 64px);
}
.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}
.page-faq [id] {
  scroll-margin-top: calc(var(--header-top) + var(--nav-h) + 20px);
}

.faq-container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.faq-breadcrumb {
  margin-bottom: clamp(20px, 3vw, 40px);
}

.faq-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-orange);
}
.faq-label::before {
  content: "";
  width: 22px;
  height: 3px;
  background: var(--c-orange);
}

.faq-hero {
  position: relative;
  overflow: hidden;
  margin-bottom: var(--faq-space);
  padding: clamp(28px, 5vw, 56px) clamp(20px, 4vw, 56px);
  background: var(--c-ink);
  border-radius: var(--r-lg);
  color: var(--c-white);
}
.faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  pointer-events: none;
}
.faq-hero__deco {
  position: absolute;
  z-index: 0;
  top: 50%;
  right: -8px;
  transform: translateY(-50%);
  font-family: var(--f-headline-cn);
  font-size: clamp(96px, 16vw, 220px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.05);
  user-select: none;
  white-space: nowrap;
}
.faq-hero__corner {
  position: absolute;
  z-index: 1;
  right: 0;
  bottom: 0;
  width: clamp(44px, 6vw, 84px);
  height: clamp(44px, 6vw, 84px);
  background: var(--c-teal);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}
.faq-hero__content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}
.faq-hero h1 {
  font-family: var(--f-headline-cn);
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 0 0 14px;
}
.faq-hero__desc {
  max-width: 600px;
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-rock);
}
.faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.faq-hero__stat {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.07);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-rock);
}
.faq-hero__stat--teal {
  color: var(--c-teal);
  border-color: rgba(0, 194, 168, 0.38);
}

.faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-space);
}

.faq-index__panel {
  padding: 16px;
  background: var(--c-white);
  border: 1px solid rgba(10, 31, 68, 0.08);
  border-radius: var(--r-md);
  box-shadow: 0 2px 0 rgba(10, 31, 68, 0.05);
}
.faq-index__heading {
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--c-teal-light);
  font-family: var(--f-headline-cn);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-iron);
}
.faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.faq-index__list::-webkit-scrollbar {
  display: none;
}
.faq-index__link {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: var(--r-pill);
  background: var(--c-teal-light);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-ink);
  text-decoration: none;
  transition: background var(--ease-fast) ease, transform var(--ease-fast) ease;
}
.faq-index__link:hover {
  background: var(--c-teal);
  transform: translateY(-1px);
}
.faq-index__link:focus-visible,
.faq-index__help:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: 2px;
}
.faq-index__tag {
  font-family: var(--f-headline-cn);
  font-size: 12px;
  color: var(--c-iron);
}
.faq-index__link:hover .faq-index__tag {
  color: var(--c-ink);
}
.faq-index__help {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding: 11px 14px;
  border-radius: var(--r-md);
  background: var(--c-orange-light);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-ink);
  text-decoration: none;
  transition: background var(--ease-fast) ease, transform var(--ease-fast) ease;
}
.faq-index__help:hover {
  background: var(--c-orange);
  transform: translateY(-1px);
}

.faq-content {
  display: flex;
  flex-direction: column;
  gap: var(--faq-space);
}

.faq-group {
  padding: clamp(20px, 3.5vw, 36px);
  background: var(--c-white);
  border: 1px solid rgba(10, 31, 68, 0.08);
  border-radius: var(--r-lg);
  box-shadow: 0 2px 0 rgba(10, 31, 68, 0.05);
}
.faq-group--data,
.faq-group--account {
  box-shadow: inset 0 4px 0 var(--c-teal), 0 2px 0 rgba(10, 31, 68, 0.05);
}
.faq-group--operation {
  box-shadow: inset 0 4px 0 var(--c-orange), 0 2px 0 rgba(10, 31, 68, 0.05);
}
.faq-group--account {
  background: var(--c-ink);
  color: var(--c-white);
  box-shadow: inset 0 4px 0 var(--c-teal), 0 12px 24px rgba(6, 13, 31, 0.18);
}
.faq-group__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--c-teal-light);
}
.faq-group__num {
  flex-shrink: 0;
  transform: translateY(-2px);
  font-family: var(--f-headline-cn);
  font-size: 40px;
  line-height: 0.9;
  color: var(--c-teal);
}
.faq-group__title {
  margin: 0 0 4px;
  font-family: var(--f-headline-cn);
  font-size: clamp(20px, 3vw, 26px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--c-ink);
}
.faq-group__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--c-iron);
}
.faq-group--account .faq-group__head {
  border-bottom-color: rgba(0, 194, 168, 0.4);
}
.faq-group--account .faq-group__title {
  color: var(--c-white);
}
.faq-group--account .faq-group__desc {
  color: var(--c-rock);
}

.faq-group__list {
  display: grid;
  gap: 10px;
}
.page-faq details.expandable {
  margin: 0;
  background: var(--c-mist);
  border: 1px solid rgba(10, 31, 68, 0.06);
  border-radius: var(--r-md);
  transition: background var(--ease-fast) ease, border-color var(--ease-fast) ease, box-shadow var(--ease-fast) ease;
}
.page-faq details.expandable[open] {
  background: var(--c-white);
  border-color: rgba(10, 31, 68, 0.14);
  box-shadow: 0 2px 0 rgba(10, 31, 68, 0.04);
}
.page-faq details.expandable summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
  transition: color var(--ease-fast) ease;
}
.page-faq details.expandable summary::-webkit-details-marker {
  display: none;
}
.page-faq details.expandable summary:hover {
  color: var(--c-orange);
}
.page-faq details.expandable summary:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: -2px;
  border-radius: var(--r-md);
}
.page-faq details.expandable summary::after {
  content: "";
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  margin-left: auto;
  border-right: 2px solid var(--c-orange);
  border-bottom: 2px solid var(--c-orange);
  transform: translateY(-2px) rotate(45deg);
  transition: transform var(--ease-fast) ease;
}
.page-faq details.expandable[open] summary::after {
  transform: translateY(3px) rotate(225deg);
}
.faq-q__num {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-ink);
  color: var(--c-white);
  font-family: var(--f-headline-cn);
  font-size: 13px;
  line-height: 1;
}
.faq-q__text {
  line-height: 1.4;
}
.page-faq .expandable__content {
  padding: 2px 16px 16px 56px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-iron);
}
.page-faq .expandable__content p {
  margin: 0;
}
.page-faq .expandable__content a {
  font-weight: 600;
  color: var(--c-ink);
  text-decoration: underline;
  text-decoration-color: var(--c-teal);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  transition: color var(--ease-fast) ease, text-decoration-color var(--ease-fast) ease;
}
.page-faq .expandable__content a:hover {
  color: var(--c-orange);
  text-decoration-color: var(--c-orange);
}

.faq-group--account details.expandable {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
}
.faq-group--account details.expandable[open] {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}
.faq-group--account details.expandable summary {
  color: var(--c-white);
}
.faq-group--account details.expandable summary:hover {
  color: var(--c-teal);
}
.faq-group--account .faq-q__num {
  background: var(--c-teal);
  color: var(--c-ink);
}
.faq-group--account .expandable__content {
  color: var(--c-rock);
}
.faq-group--account .expandable__content a {
  color: var(--c-white);
}
.faq-group--account .expandable__content a:hover {
  color: var(--c-teal);
  text-decoration-color: var(--c-teal);
}

.faq-figure {
  margin: 20px 0 0;
  background: var(--c-ink);
  border-radius: var(--r-md);
  overflow: hidden;
}
.faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}
.faq-figure figcaption {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid rgba(10, 31, 68, 0.06);
  background: var(--c-white);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-iron);
}
.faq-figure figcaption::before {
  content: "";
  flex-shrink: 0;
  width: 18px;
  height: 2px;
  background: var(--c-orange);
}

.faq-help {
  position: relative;
  overflow: hidden;
  margin-top: var(--faq-space);
  margin-bottom: 8px;
  padding: clamp(24px, 4vw, 44px);
  background: var(--c-white);
  border: 2px solid var(--c-orange);
  border-radius: var(--r-lg);
}
.faq-help::before {
  content: "";
  position: absolute;
  top: -56px;
  right: -56px;
  width: 160px;
  height: 160px;
  background: var(--c-orange-light);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
  opacity: 0.7;
}
.faq-help__badge {
  display: none;
}
.faq-help__info {
  position: relative;
  z-index: 3;
  max-width: 720px;
}
.faq-help__title {
  margin: 0 0 10px;
  font-family: var(--f-headline-cn);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}
.faq-help__desc {
  margin: 0 0 20px;
  max-width: 560px;
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-iron);
}
.faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  max-width: 640px;
  margin-bottom: 24px;
}
.faq-help__item {
  padding: 16px 18px;
  background: var(--c-mist);
  border: 1px solid rgba(10, 31, 68, 0.05);
  border-radius: var(--r-md);
}
.faq-help__type {
  display: block;
  margin-bottom: 5px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-iron);
}
.faq-help__value {
  display: inline-block;
  padding-bottom: 1px;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ink);
  text-decoration: none;
  border-bottom: 2px solid var(--c-teal);
  transition: color var(--ease-fast) ease, border-color var(--ease-fast) ease;
}
.faq-help__value:hover {
  color: var(--c-orange);
  border-color: var(--c-orange);
}
.faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 640px) {
  .faq-help__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .faq-figure--offset-left {
    margin-left: clamp(20px, 7vw, 72px);
  }
  .faq-figure--offset-right {
    margin-right: clamp(20px, 7vw, 72px);
  }
  .faq-help__badge {
    display: flex;
    position: absolute;
    z-index: 4;
    right: clamp(16px, 4vw, 36px);
    bottom: clamp(16px, 4vw, 36px);
    align-items: center;
    justify-content: center;
    width: 92px;
    height: 92px;
    border-radius: 50%;
    background: var(--c-orange);
    color: var(--c-ink);
    font-family: var(--f-headline-cn);
    font-size: 16px;
    line-height: 1.25;
    text-align: center;
    transform: rotate(6deg);
    box-shadow: 0 6px 0 rgba(255, 107, 53, 0.28);
  }
  .faq-help__info {
    padding-right: 120px;
  }
}

@media (min-width: 1024px) {
  .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }
  .faq-index {
    position: sticky;
    top: calc(var(--header-top) + var(--nav-h) + 20px);
  }
  .faq-index__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
  }
  .faq-index__link {
    display: flex;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: var(--r-sm);
    background: transparent;
  }
  .faq-index__link:hover {
    background: var(--c-teal-light);
  }
}