/* =========================================================
   帮助中心 · 页面专属样式（作用域：.page-faq）
   ========================================================= */

.page-faq {
  --faq-on-dark: rgba(247, 243, 234, 0.86);
  --faq-on-dark-soft: rgba(247, 243, 234, 0.68);
  --faq-hairline: rgba(201, 169, 97, 0.45);

  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  padding-bottom: 0;
  overflow-x: hidden;
}

.page-faq :where(h1, h2, h3) {
  font-family: var(--font-serif);
  font-weight: 600;
}

.page-faq :where(a) {
  color: var(--celadon);
}

/* ---------- 面包屑与导语 ---------- */

.page-faq .breadcrumb {
  padding-top: 28px;
}

.page-faq .breadcrumb__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--mist);
}

.page-faq .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--wood);
}

.page-faq .breadcrumb__list a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .breadcrumb__list a:hover {
  color: var(--celadon);
  text-decoration: underline;
}

.page-faq .faq-intro {
  padding: 26px 0 8px;
  max-width: 44em;
}

.page-faq .faq-intro__eyebrow {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--celadon);
  border-bottom: 1px solid var(--gold);
  padding-bottom: 6px;
}

.page-faq .faq-intro h1 {
  margin: 20px 0 0;
  font-size: 28px;
  line-height: 1.38;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-faq .faq-intro__lede {
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 38em;
}

/* ---------- 三步上手 ---------- */

.page-faq .faq-steps {
  margin-top: 48px;
  padding: 64px 0 60px;
  background-color: var(--paper-2);
  border-top: var(--line-gold);
  border-bottom: var(--line-soft);
}

.page-faq .steps {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 28px;
}

.page-faq .step {
  position: relative;
  border-top: 1px solid var(--gold);
  padding-top: 22px;
}

.page-faq .step__top {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--celadon);
}

.page-faq .step__index {
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-faq .step__title {
  margin: 14px 0 0;
  font-size: 20px;
  line-height: 1.45;
  color: var(--ink);
}

.page-faq .step__time {
  display: inline-block;
  margin: 12px 0 0;
  padding: 3px 10px;
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--cinnabar);
  border: 1px solid rgba(178, 58, 46, 0.35);
}

.page-faq .step__text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink);
}

@media (min-width: 860px) {
  .page-faq .steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }

  .page-faq .step {
    border-top: 0;
    padding: 0 32px;
  }

  .page-faq .step:first-child {
    padding-left: 0;
  }

  .page-faq .step:last-child {
    padding-right: 0;
  }

  .page-faq .step + .step {
    border-left: var(--line-wood);
  }
}

/* ---------- 通用图组 ---------- */

.page-faq .figure {
  margin: 0;
}

.page-faq .figure__frame {
  overflow: hidden;
  border: var(--line-soft);
  background-color: var(--paper-2);
}

.page-faq .figure__media,
.page-faq .figure__frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.88);
}

.page-faq .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-steps__figure {
  margin-top: 44px;
}

/* ---------- 双栏主体 ---------- */

.page-faq .faq-body {
  display: grid;
  gap: 44px;
  padding-top: 72px;
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 72px;
    padding-top: 88px;
  }
}

/* 左侧粘性目录 */

.page-faq .faq-toc {
  border-top: var(--line-gold);
  padding-top: 18px;
}

.page-faq .faq-toc__title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 18px;
}

.page-faq .faq-toc__link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 6px 0;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink);
  text-decoration: none;
  border-bottom: var(--line-soft);
  transition: color 160ms var(--ease);
}

.page-faq .faq-toc__link::before {
  content: "";
  flex: none;
  width: 7px;
  height: 7px;
  background-color: var(--gold);
  transform: rotate(45deg);
  transition: background-color 160ms var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--celadon);
}

.page-faq .faq-toc__link:hover::before,
.page-faq .faq-toc__link:focus-visible::before {
  background-color: var(--cinnabar);
}

@media (min-width: 960px) {
  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-faq .faq-toc__list {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }
}

/* 右侧问答流 */

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

.page-faq .faq-group {
  margin-bottom: 64px;
  scroll-margin-top: 112px;
}

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

.page-faq .faq-group__head {
  border-top: var(--line-gold);
  padding-top: 18px;
  margin-bottom: 20px;
}

.page-faq .faq-group__no {
  display: block;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--mist);
}

.page-faq .faq-group__title {
  margin: 8px 0 0;
  font-size: 22px;
  line-height: 1.4;
  color: var(--ink);
}

@media (min-width: 768px) {
  .page-faq .faq-group__title {
    font-size: 26px;
  }
}

.page-faq .faq-group__lede {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 34em;
}

/* ---------- 折叠问答 ---------- */

.page-faq .fold {
  border-bottom: var(--line-soft);
}

.page-faq .fold:first-of-type {
  border-top: var(--line-soft);
}

.page-faq .fold__title {
  position: relative;
  display: block;
  list-style: none;
  cursor: pointer;
  padding: 18px 40px 18px 0;
  min-height: 44px;
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.65;
  color: var(--ink);
  transition: color 160ms var(--ease);
}

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

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

.page-faq .fold__title::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1;
  color: var(--wood);
  transition: color 160ms var(--ease);
}

.page-faq .fold__title:hover {
  color: var(--celadon);
}

.page-faq .fold[open] > .fold__title {
  color: var(--celadon);
}

.page-faq .fold[open] > .fold__title::after {
  content: "\2212";
  color: var(--cinnabar);
}

.page-faq .fold__body {
  padding: 0 0 22px 16px;
  border-left: 2px solid transparent;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ink);
  max-width: 42em;
}

.page-faq .fold[open] > .fold__body {
  border-left-color: var(--cinnabar);
}

.page-faq .fold__body p {
  margin: 0 0 10px;
}

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

.page-faq .fold__body ul {
  margin: 8px 0 0;
  padding-left: 18px;
}

.page-faq .fold__body li {
  margin-bottom: 6px;
}

/* 大屏与导出配图 */

.page-faq .faq-figure {
  margin-top: 32px;
}

/* ---------- 术语小卡 ---------- */

.page-faq .faq-terms {
  padding: 72px 0 76px;
  background-color: var(--paper);
  border-top: var(--line-gold);
}

.page-faq .faq-terms__grid {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

@media (min-width: 720px) {
  .page-faq .faq-terms__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

.page-faq .term-card {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 18px 20px;
  background-color: var(--paper-2);
  border: var(--line-soft);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-faq .term-card:hover {
  transform: translateY(-4px);
  border-color: var(--cinnabar);
  background-color: var(--paper);
}

.page-faq .term-card__term {
  flex: 0 0 5.5em;
  min-width: 0;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--celadon);
}

.page-faq .term-card__desc {
  flex: 1 1 12em;
  min-width: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .faq-terms__more {
  margin: 32px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-terms__more a {
  color: var(--celadon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-terms__more a:hover {
  color: var(--cinnabar);
}

/* ---------- 底部求助 ---------- */

.page-faq .faq-help {
  padding: 0 0 96px;
}

.page-faq .faq-help__panel {
  position: relative;
  padding: 40px 24px 44px;
  background-color: var(--indigo);
  border-top: 3px solid var(--cinnabar);
  color: var(--paper);
}

@media (min-width: 768px) {
  .page-faq .faq-help__panel {
    padding: 56px 56px 56px;
  }
}

.page-faq .faq-help__no {
  display: block;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-faq .faq-help__title {
  margin: 12px 0 0;
  font-size: 24px;
  line-height: 1.4;
  color: var(--paper);
}

@media (min-width: 768px) {
  .page-faq .faq-help__title {
    font-size: 28px;
  }
}

.page-faq .faq-help__lede {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--faq-on-dark);
  max-width: 36em;
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  max-width: 40em;
}

.page-faq .faq-help__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  padding: 14px 0;
  border-top: 1px solid var(--faq-hairline);
}

.page-faq .faq-help__label {
  flex: 0 0 5.5em;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-faq .faq-help__value {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-faq .faq-help__note {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--faq-on-dark-soft);
}

.page-faq .faq-help__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.page-faq .faq-help__aside {
  margin: 22px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--faq-on-dark-soft);
}

.page-faq .faq-help__aside a {
  color: var(--paper);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-help__aside a:hover {
  color: var(--gold);
}

/* ---------- 动效与降级 ---------- */

@media (prefers-reduced-motion: no-preference) {
  .page-faq [data-reveal] {
    opacity: 1;
  }

  .page-faq .reveal-ready [data-reveal]:not(.is-visible) {
    opacity: 0;
    transform: translateY(12px);
  }

  .page-faq [data-reveal] {
    transition: opacity 240ms var(--ease), transform 240ms var(--ease);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .term-card,
  .page-faq .fold__title,
  .page-faq .faq-toc__link {
    transition: none;
  }

  .page-faq .term-card:hover {
    transform: none;
  }
}

/* ---------- 焦点可见 ---------- */

.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 3px;
}

/* ---------- 窄屏兜底 ---------- */

@media (max-width: 480px) {
  .page-faq .faq-intro h1 {
    font-size: 25px;
  }

  .page-faq .faq-steps {
    padding: 48px 0 44px;
  }

  .page-faq .faq-help__panel {
    padding: 32px 20px 36px;
  }

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

  .page-faq .term-card__term {
    flex: 0 0 auto;
  }
}