.page-faq {
  --faq-sticky: calc(var(--topbar-h) + 24px);
  --faq-tint: var(--blue-l);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(22px, 4vw, 46px) 0 clamp(30px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper) 62%, var(--blue-l) 62%, var(--blue-l) 100%);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 46px);
  align-items: center;
  margin-top: clamp(18px, 3vw, 34px);
}

.page-faq .faq-hero__label {
  display: inline-block;
  margin: 0 0 14px;
  color: var(--blue-d);
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 7vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 18px;
  max-width: 14em;
}

.page-faq .faq-hero__lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--gray);
  max-width: 34em;
  margin: 0 0 26px;
  padding-left: 14px;
  border-left: 3px solid var(--orange);
}

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

.page-faq .faq-hero__media {
  margin: 0;
  position: relative;
  background: var(--blue-l);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 6%, 100% 100%, 0 94%);
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--line);
  pointer-events: none;
  clip-path: polygon(0 0, 100% 6%, 100% 100%, 0 94%);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 48px);
  padding: clamp(28px, 4.5vw, 60px) 0 clamp(48px, 7vw, 96px);
  align-items: start;
}

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

/* ---------- 主题索引 ---------- */
.page-faq .faq-nav {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-nav__title {
  margin: 0;
  color: var(--gray);
}

.page-faq .faq-nav__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0 0 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-nav__item {
  flex: 0 0 auto;
}

.page-faq .faq-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--blue-d);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
  background: var(--orange-s);
}

.page-faq .faq-nav__num {
  color: var(--gray);
  font-size: 11px;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-bottom: clamp(38px, 5vw, 70px);
  scroll-margin-top: var(--faq-sticky);
}

.page-faq .faq-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding-top: 16px;
  border-top: 2px solid var(--ink);
}

.page-faq .faq-group__num {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-faq .faq-group__title {
  flex: 1 1 12em;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 3.2vw, 1.95rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0;
}

.page-faq .faq-group__count {
  flex: 0 0 auto;
}

.page-faq .faq-group__intro {
  max-width: 40em;
  margin: 14px 0 24px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--gray);
}

/* ---------- 问答折叠组 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item .disclosure__trigger {
  position: relative;
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 4px 18px 16px;
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-body);
  transition: background-color 0.2s var(--ease);
}

.page-faq .faq-item .disclosure__trigger::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  background: var(--orange);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.28s var(--ease);
}

.page-faq .faq-item[data-open] > .disclosure__trigger::before {
  transform: scaleY(1);
}

.page-faq .faq-item .disclosure__trigger:hover {
  background: var(--blue-l);
}

.page-faq .faq-q {
  font-size: clamp(15.5px, 1.6vw, 17px);
  font-weight: 700;
  line-height: 1.62;
  color: var(--ink);
}

.page-faq .disclosure__state {
  flex: 0 0 auto;
  position: relative;
  width: 24px;
  height: 24px;
  margin-top: 3px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--paper);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .disclosure__state::before,
.page-faq .disclosure__state::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 1.5px;
  background: var(--blue);
  transform: translate(-50%, -50%);
  transition: transform 0.25s var(--ease), opacity 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .disclosure__state::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.page-faq .faq-item[data-open] > .disclosure__trigger .disclosure__state {
  border-color: var(--green);
  background: var(--green-s);
}

.page-faq .faq-item[data-open] > .disclosure__trigger .disclosure__state::before {
  background: var(--green);
}

.page-faq .faq-item[data-open] > .disclosure__trigger .disclosure__state::after {
  transform: translate(-50%, -50%) rotate(0deg);
  opacity: 0;
}

.page-faq .faq-item .disclosure__panel {
  padding-left: 16px;
}

.page-faq .faq-a {
  max-width: 42em;
  padding: 2px 0 22px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--gray);
}

.page-faq .faq-a p {
  margin: 0 0 12px;
}

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

.page-faq .faq-a__tail {
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 14.5px;
}

.page-faq .faq-num {
  color: var(--orange);
  font-size: 1.15em;
}

.page-faq .faq-mono {
  font-family: var(--font-mono);
  font-size: 0.94em;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .faq-inline-link {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-underline-offset: 3px;
}

.page-faq .faq-inline-link:hover {
  color: var(--orange);
}

/* ---------- 内嵌图 ---------- */
.page-faq .faq-spark {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
  margin: 6px 0 14px;
}

.page-faq .faq-figure {
  margin: 0 0 26px;
  position: relative;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
}

.page-faq .faq-figure__caption {
  margin-top: 10px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

/* ---------- 视图切换 ---------- */
.page-faq .faq-tabs {
  margin: 12px 0 6px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.page-faq .faq-tabs .tabs__list {
  display: flex;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-tabs .tabs__btn {
  flex: 1 1 0;
  padding: 10px 12px;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  color: var(--gray);
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-faq .faq-tabs .tabs__btn:last-child {
  border-right: 0;
}

.page-faq .faq-tabs .tabs__btn[aria-selected="true"] {
  background: var(--blue);
  color: var(--paper);
}

.page-faq .faq-tabs .tabs__btn:hover:not([aria-selected="true"]) {
  background: var(--orange-s);
  color: var(--ink);
}

.page-faq .faq-tabs .tabs__panel {
  padding: 14px 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.page-faq .faq-tabs .tabs__panel p {
  margin: 0;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 26px;
  padding-top: 26px;
  border-top: 2px solid var(--ink);
}

.page-faq .faq-cta__text {
  flex: 1 1 22em;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero__media img {
    aspect-ratio: 2 / 1;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-faq .faq-layout {
    grid-template-columns: 176px minmax(0, 1fr);
  }

  .page-faq .faq-nav {
    position: sticky;
    top: var(--faq-sticky);
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-faq .faq-nav__list {
    writing-mode: vertical-rl;
    display: flex;
    flex-wrap: wrap;
    max-height: 52vh;
    gap: 6px;
    margin-top: 16px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-nav__link {
    writing-mode: vertical-rl;
    padding: 14px 7px;
    font-size: 12.5px;
    letter-spacing: 0.16em;
  }

  .page-faq .faq-nav__num {
    margin-bottom: 8px;
    letter-spacing: 0.1em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item .disclosure__trigger::before,
  .page-faq .disclosure__state,
  .page-faq .disclosure__state::before,
  .page-faq .disclosure__state::after,
  .page-faq .faq-nav__link,
  .page-faq .faq-tabs .tabs__btn {
    transition: none;
  }
}