.page-faq {
  --faq-line: 2px solid var(--ink-4);
  --faq-sticky-top: calc(var(--header-h) + 1.25rem);
  background: var(--ink);
  color: var(--paper);
}

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

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(2rem, 6vw, 4rem)) 0 clamp(2.5rem, 6vw, 4rem);
  border-bottom: var(--faq-line);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(118deg, rgba(182, 255, 59, .12) 0%, rgba(182, 255, 59, 0) 44%),
    linear-gradient(-118deg, rgba(255, 106, 26, .1) 0%, rgba(255, 106, 26, 0) 40%);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -58%;
  width: 44%;
  aspect-ratio: 1;
  border: 2px solid rgba(182, 255, 59, .18);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3rem);
  align-items: center;
}

.page-faq .faq-hero-copy {
  min-width: 0;
}

.page-faq .breadcrumbs {
  margin-bottom: .9rem;
}

.page-faq .faq-title {
  font-family: var(--f-display);
  font-weight: 200;
  font-size: clamp(2.75rem, 10vw, 5.5rem);
  line-height: .92;
  letter-spacing: -.01em;
  margin: .3rem 0 .9rem;
  color: var(--paper);
}

.page-faq .faq-lede {
  max-width: 48ch;
  margin: 0 0 1.75rem;
  font-size: clamp(1rem, 1.4vw, 1.08rem);
  line-height: 1.8;
  color: rgba(244, 247, 242, .82);
}

.page-faq .faq-search {
  max-width: 34rem;
}

.page-faq .faq-search-label {
  display: block;
  font-family: var(--f-num);
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--steel);
  margin-bottom: .5rem;
}

.page-faq .faq-search-box {
  display: flex;
  align-items: center;
  gap: .7rem;
  max-width: 100%;
  background: var(--ink-2);
  border: 2px solid var(--ink-4);
  padding: .15rem .35rem .15rem .95rem;
  box-shadow: var(--shadow-hard);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-search-box:focus-within {
  border-color: var(--lime);
}

.page-faq .faq-search-icon {
  flex: 0 0 auto;
  color: var(--lime);
}

.page-faq .faq-search-box input {
  flex: 1 1 auto;
  min-width: 0;
  background: none;
  border: 0;
  color: var(--paper);
  font-family: var(--f-body);
  font-size: .98rem;
  padding: .9rem 0;
}

.page-faq .faq-search-box input::placeholder {
  color: var(--steel);
}

.page-faq .faq-search-box input:focus {
  outline: none;
}

.page-faq .faq-hero-visual {
  position: relative;
  min-width: 0;
}

.page-faq .faq-hero-visual .frame {
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-visual-badge {
  position: absolute;
  left: -.5rem;
  bottom: -1.1rem;
  display: flex;
  align-items: baseline;
  gap: .5rem;
  background: var(--lime);
  color: var(--ink);
  border: 2px solid var(--ink);
  padding: .5rem .85rem;
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-visual-badge-num {
  font-family: var(--f-num);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-faq .faq-visual-badge-label {
  font-size: .78rem;
  font-weight: 600;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.25rem;
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  align-items: start;
}

.page-faq .faq-index {
  border: var(--faq-line);
  background: var(--ink-2);
  padding: 1.15rem 1.2rem 1.35rem;
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-index-title {
  margin: 0 0 .85rem;
  font-family: var(--f-num);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--lime);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .15rem;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: baseline;
  gap: .65rem;
  padding: .5rem .45rem;
  border-left: 3px solid transparent;
  color: rgba(244, 247, 242, .78);
  font-size: .95rem;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  border-left-color: var(--lime);
  background: var(--ink-4);
  color: var(--paper);
}

.page-faq .faq-index-link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 1px;
}

.page-faq .faq-index-num {
  font-family: var(--f-num);
  font-size: .72rem;
  color: var(--steel);
}

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

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(2.5rem, 5vw, 3.5rem);
  scroll-margin-top: var(--faq-sticky-top);
}

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

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: .9rem;
  row-gap: .45rem;
  align-items: baseline;
  padding-bottom: .85rem;
  border-bottom: 3px solid var(--lime);
  margin-bottom: 1.5rem;
}

.page-faq .faq-group-num {
  font-family: var(--f-num);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: .04em;
}

.page-faq .faq-group-title {
  font-family: var(--f-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 4vw, 2.35rem);
  line-height: 1.08;
  letter-spacing: .01em;
  margin: 0;
  color: var(--paper);
}

.page-faq .faq-group-lede {
  grid-column: 1 / -1;
  margin: 0;
  font-size: .95rem;
  line-height: 1.7;
  color: rgba(244, 247, 242, .6);
}

.page-faq .faq-group--alert .faq-group-head {
  border-bottom-color: var(--orange);
}

.page-faq .faq-group--alert .faq-group-num {
  color: var(--orange);
}

/* ---------- 折叠面板 ---------- */
.page-faq .faq-item {
  border: 2px solid var(--ink-4);
  background: var(--ink-2);
  margin-bottom: .75rem;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--steel);
}

.page-faq .faq-item[open] {
  border-color: var(--lime);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-group--alert .faq-item[open] {
  border-color: var(--orange);
  box-shadow: var(--shadow-orange);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: .95rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--paper);
  transition: background var(--dur) var(--ease);
}

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

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item > summary:hover {
  background: var(--ink-4);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-faq .faq-item > summary::after {
  content: "+";
  font-family: var(--f-num);
  font-size: 1.3rem;
  line-height: 1;
  color: var(--lime);
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
}

.page-faq .faq-group--alert .faq-item > summary::after {
  color: var(--orange);
}

.page-faq .faq-item-num {
  font-family: var(--f-num);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--steel);
}

.page-faq .faq-item[open] .faq-item-num {
  color: var(--lime);
}

.page-faq .faq-group--alert .faq-item[open] .faq-item-num {
  color: var(--orange);
}

.page-faq .faq-item-q {
  min-width: 0;
}

.page-faq .faq-answer {
  margin: 0 1.1rem;
  padding: .95rem 0 1.3rem;
  border-top: 1px solid var(--ink-4);
  font-size: .97rem;
  line-height: 1.8;
  color: rgba(244, 247, 242, .82);
}

.page-faq .faq-answer p {
  margin: 0 0 .8rem;
}

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

.page-faq .faq-answer ul {
  margin: .6rem 0 .9rem;
  padding-left: 1.15rem;
  list-style: none;
}

.page-faq .faq-answer li {
  position: relative;
  padding-left: .9rem;
  margin-bottom: .35rem;
}

.page-faq .faq-answer li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: .38rem;
  height: .38rem;
  background: var(--lime);
}

.page-faq .faq-answer a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-underline-offset: .18em;
}

.page-faq .faq-answer a:hover,
.page-faq .faq-answer a:focus-visible {
  color: var(--lime);
}

.page-faq .faq-answer strong {
  color: var(--lime-soft);
  font-weight: 700;
}

/* ---------- 勘误流程图 ---------- */
.page-faq .faq-flow {
  margin: 0 0 1.5rem;
}

.page-faq .faq-flow .frame {
  border: 2px solid var(--ink-4);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-flow figcaption {
  margin-top: .7rem;
  font-size: .85rem;
  line-height: 1.65;
  color: var(--steel);
}

/* ---------- 联系区 ---------- */
.page-faq .faq-help {
  border-top: var(--faq-line);
  background: var(--ink-2);
  padding: clamp(2.5rem, 6vw, 4.5rem) 0 calc(clamp(2.5rem, 6vw, 4.5rem) + 1rem);
  scroll-margin-top: var(--faq-sticky-top);
}

.page-faq .faq-help-card {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  border: 2px solid var(--ink-4);
  box-shadow: var(--shadow-hard);
  padding: clamp(1.5rem, 4vw, 2.75rem);
}

.page-faq .faq-help-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--lime), var(--orange));
}

.page-faq .faq-help-title {
  font-family: var(--f-display);
  font-weight: 300;
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  line-height: 1.06;
  margin: .9rem 0 1rem;
  color: var(--paper);
}

.page-faq .faq-help-text {
  max-width: 62ch;
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(244, 247, 242, .82);
}

.page-faq .faq-help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.6rem;
}

.page-faq .faq-help-note {
  margin: 1.4rem 0 0;
  padding-top: 1.1rem;
  border-top: 1px dashed var(--ink-4);
  font-size: .88rem;
  line-height: 1.8;
  color: var(--steel);
}

.page-faq .faq-help-note a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-underline-offset: .18em;
}

.page-faq .faq-help-note a:hover,
.page-faq .faq-help-note a:focus-visible {
  color: var(--lime);
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 599px) {
  .page-faq .faq-hero::after {
    display: none;
  }

  .page-faq .faq-visual-badge {
    left: 0;
    bottom: -.9rem;
    padding: .45rem .7rem;
  }

  .page-faq .faq-item > summary {
    gap: .6rem;
    padding: .9rem .85rem;
    font-size: .95rem;
  }

  .page-faq .faq-answer {
    margin: 0 .85rem;
    font-size: .94rem;
  }

  .page-faq .faq-help-actions .btn {
    width: 100%;
    text-align: center;
  }

  .page-faq .faq-help-note {
    overflow-wrap: anywhere;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    column-gap: clamp(2rem, 5vw, 4rem);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 4rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky-top);
  }
}