/* ===== 帮助中心 · page-faq ===== */

.page-faq {
  background: var(--cream-050);
  color: var(--brown-900);
}

/* ---------- 页首 ---------- */

.page-faq .faq-hero {
  position: relative;
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(44, 84, 116, .55) 0%, rgba(10, 26, 42, 0) 62%),
    var(--ink-900);
  color: var(--on-ink);
  overflow: hidden;
}

.page-faq .faq-hero__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px) var(--gutter) clamp(32px, 4.5vw, 54px);
}

.page-faq .faq-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--on-ink-faint);
}

.page-faq .faq-hero .breadcrumb a {
  color: var(--gold-200);
  text-decoration: none;
}

.page-faq .faq-hero .breadcrumb a:hover {
  color: var(--gold-500);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-hero .breadcrumb__sep {
  color: var(--on-ink-faint);
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold-500);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--cream-050);
}

.page-faq .faq-hero__lead {
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.78;
  color: var(--on-ink-soft);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px clamp(18px, 3.4vw, 38px);
  margin: clamp(24px, 3.4vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__facts li {
  padding-left: 12px;
  border-left: 1px solid var(--gold-line);
  font-size: 13px;
  line-height: 1.5;
  color: var(--on-ink-faint);
}

.page-faq .faq-hero__facts strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  line-height: 1.15;
  color: var(--gold-500);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border-top: 1px solid rgba(216, 162, 63, .3);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1600 / 480;
  object-fit: cover;
  opacity: .9;
}

/* ---------- 主体：左树右表 ---------- */

.page-faq .faq-body__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  align-items: start;
}

.page-faq .faq-body__aside {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.page-faq .faq-tree {
  background: var(--cream-100);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: 12px 14px 14px;
  box-shadow: var(--shadow-1);
}

.page-faq .faq-tree__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--slate-600);
}

.page-faq .tree__node + .tree__node {
  border-top: 1px solid var(--hairline);
}

.page-faq .tree__summary {
  display: grid;
  grid-template-columns: 10px auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px 2px;
  list-style: none;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-900);
  transition: color .18s var(--ease);
}

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

.page-faq .tree__summary:hover {
  color: var(--gold-500);
}

.page-faq .tree__mark {
  width: 0;
  height: 0;
  border-left: 5px solid var(--gold-500);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  transition: transform .2s var(--ease);
}

.page-faq .tree__node[open] > .tree__summary .tree__mark {
  transform: rotate(90deg);
}

.page-faq .tree__num {
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1;
  padding: 3px 5px;
  color: var(--gold-500);
  border: 1px solid var(--gold-line);
  border-radius: 2px;
}

.page-faq .tree__name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.page-faq .tree__count {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate-600);
}

.page-faq .tree__leaf {
  margin: 0 0 12px 5px;
  padding: 4px 0 4px 14px;
  list-style: none;
  border-left: 1px dashed var(--gold-line);
}

.page-faq .tree__leaf li + li {
  margin-top: 2px;
}

.page-faq .tree__leaf a {
  display: block;
  padding: 4px 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate-600);
  text-decoration: none;
  transition: color .18s var(--ease);
}

.page-faq .tree__leaf a:hover {
  color: var(--ink-900);
  text-decoration: underline;
  text-decoration-color: var(--gold-500);
  text-underline-offset: 3px;
}

.page-faq .faq-aside__figure {
  margin: 0;
  background: var(--cream-100);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.page-faq .faq-aside__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
}

.page-faq .faq-aside__figure figcaption {
  padding: 9px 12px;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .02em;
  color: var(--slate-600);
}

/* ---------- 问答列表 ---------- */

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

.page-faq .faq-list__title {
  margin: 0;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.32;
  color: var(--ink-900);
}

.page-faq .faq-list__lead {
  margin: 12px 0 clamp(26px, 3.4vw, 38px);
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate-600);
}

.page-faq .faq-cat + .faq-cat {
  margin-top: clamp(30px, 4vw, 46px);
}

.page-faq .faq-cat__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hairline-strong);
}

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  padding: 3px 6px;
  color: var(--coral-500);
  border: 1px solid rgba(226, 103, 63, .45);
  border-radius: 2px;
}

.page-faq .faq-cat__title {
  flex: 1 1 auto;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.3;
  color: var(--ink-900);
}

.page-faq .faq-cat__count {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--slate-600);
}

.page-faq .faq-cat__desc {
  margin: 12px 0 16px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--slate-600);
}

.page-faq .qa {
  background: var(--cream-050);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .qa + .qa {
  margin-top: 12px;
}

.page-faq .qa:hover {
  border-color: var(--gold-line);
}

.page-faq .qa[open] {
  border-color: var(--gold-line);
  box-shadow: var(--shadow-1);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 14px;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  list-style: none;
  cursor: pointer;
}

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

.page-faq .qa__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--gold-500);
}

.page-faq .qa__text {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--brown-900);
}

.page-faq .qa__q:hover .qa__text {
  text-decoration: underline;
  text-decoration-color: var(--gold-500);
  text-underline-offset: 4px;
}

.page-faq .qa__mark {
  position: relative;
  width: 14px;
  height: 14px;
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  background: var(--gold-500);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
}

.page-faq .qa__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .qa__mark::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  margin: 0 16px 16px;
  padding: 14px 16px;
  background: var(--cream-100);
  border-left: 2px solid var(--gold-500);
  border-radius: 2px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--brown-900);
}

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

/* ---------- 自助路径 ---------- */

.page-faq .faq-path {
  position: relative;
  background: var(--ink-900);
  color: var(--on-ink);
  overflow: hidden;
}

.page-faq .faq-path::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(80% 120% at 100% 0%, rgba(216, 162, 63, .18) 0%, rgba(216, 162, 63, 0) 60%);
}

.page-faq .faq-path__inner {
  position: relative;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(46px, 6vw, 82px) var(--gutter);
}

.page-faq .faq-path__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 36px);
  line-height: 1.22;
  letter-spacing: -.01em;
  color: var(--cream-050);
}

.page-faq .faq-path__steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(216, 162, 63, .3);
  border: 1px solid rgba(216, 162, 63, .3);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-step {
  background: var(--ink-900);
  padding: clamp(20px, 2.6vw, 30px);
  counter-increment: none;
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold-500);
}

.page-faq .faq-step__title {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.45;
  color: var(--cream-050);
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--on-ink-soft);
}

.page-faq .faq-path__note {
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding-left: 14px;
  border-left: 1px solid var(--gold-line);
  max-width: 76ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--on-ink-soft);
}

.page-faq .faq-path__note a {
  color: var(--gold-500);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-faq .faq-path__note a:hover {
  color: var(--gold-200);
  border-bottom-color: var(--gold-500);
}

/* ---------- 条目维护 ---------- */

.page-faq .faq-upkeep__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 46px);
  align-items: start;
}

.page-faq .faq-upkeep__text h2 {
  margin: 0 0 18px;
  font-family: var(--font-editorial);
  font-weight: 600;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.34;
  color: var(--ink-900);
}

.page-faq .faq-upkeep__text p {
  margin: 0 0 14px;
  max-width: 70ch;
  font-size: 15.5px;
  line-height: 1.88;
  color: var(--brown-900);
}

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

.page-faq .faq-upkeep__panel {
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid rgba(216, 162, 63, .38);
  border-radius: var(--radius);
  color: var(--on-ink);
}

.page-faq .faq-upkeep__code {
  margin: 10px 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 28px);
  letter-spacing: .08em;
  line-height: 1;
  color: var(--gold-500);
}

.page-faq .faq-upkeep__note {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--on-ink-soft);
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-faq .faq-path__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body__inner {
    grid-template-columns: 296px minmax(0, 1fr);
    gap: clamp(36px, 4vw, 56px);
  }

  .page-faq .faq-body__aside {
    position: sticky;
    top: 88px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-upkeep__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: clamp(36px, 4vw, 56px);
  }
}

@media (max-width: 520px) {
  .page-faq .faq-hero__facts {
    gap: 12px 18px;
  }

  .page-faq .faq-hero__facts strong {
    font-size: 20px;
  }

  .page-faq .qa__q {
    grid-template-columns: minmax(0, 1fr) 14px;
    gap: 10px;
  }

  .page-faq .qa__num {
    grid-column: 1 / -1;
    font-size: 11px;
  }

  .page-faq .qa__a {
    margin: 0 12px 14px;
    padding: 12px 14px;
    font-size: 14.5px;
  }
}