/* ===== 帮助中心 / page-faq ===== */

.page-faq {
  --faq-toc-w: 236px;
  --faq-warn-ink: #101317;
  display: block;
  background: var(--pitch-900);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

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

.page-faq a {
  color: inherit;
}

/* --- 面包屑 --- */

.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 20px 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cool-slate);
}

.page-faq .breadcrumb a {
  color: var(--cool-slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--signal-orange);
  border-bottom-color: var(--signal-orange);
}

/* --- 首屏 --- */

.page-faq .faq-hero {
  position: relative;
  background:
    radial-gradient(120% 100% at 92% 0%, rgba(255, 107, 26, 0.18), transparent 62%),
    linear-gradient(180deg, var(--pitch-900) 0%, var(--pitch-700) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 52px 52px;
  opacity: 0.16;
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding-block: 30px 40px;
}

.page-faq .faq-hero__kicker {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--cool-slate);
}

.page-faq .faq-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(30px, 6.2vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: 0.005em;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--cool-slate);
}

.page-faq .faq-hero__count {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-left: 3px solid var(--signal-orange);
  padding-left: 16px;
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(64px, 15vw, 112px);
  font-weight: 800;
  line-height: 0.86;
  letter-spacing: -0.05em;
  color: var(--signal-orange);
}

.page-faq .faq-hero__unit {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cool-slate);
}

.page-faq .faq-hero__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 16px 0 12px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--cool-slate);
  background: var(--glass-white);
  color: var(--paper);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-tag .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cool-slate);
}

.page-faq .faq-tag i {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cool-slate);
}

.page-faq .faq-tag:hover,
.page-faq .faq-tag:focus-visible {
  border-color: var(--signal-orange);
  background: rgba(255, 107, 26, 0.12);
}

.page-faq .faq-tag--nav { border-left-color: var(--signal-orange); }
.page-faq .faq-tag--data { border-left-color: var(--warning-yellow); }
.page-faq .faq-tag--screen { border-left-color: var(--cool-slate); }
.page-faq .faq-tag--contact { border-left-color: var(--paper); }

/* --- 章节色带 --- */

.page-faq .faq-band {
  width: 100%;
  height: 12px;
}

.page-faq .faq-band--signal { background: var(--signal-orange); }
.page-faq .faq-band--indigo { background: var(--indigo-800); }

/* --- 章节标题组件 --- */

.page-faq .faq-chapter {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 26px;
}

.page-faq .faq-chapter__num {
  flex: none;
  padding: 3px 7px;
  border: 1px solid rgba(255, 107, 26, 0.5);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--signal-orange);
}

.page-faq .faq-chapter__title {
  margin: 0;
  font-size: clamp(21px, 3.6vw, 30px);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--paper);
}

/* --- 三步上手 --- */

.page-faq .faq-steps {
  background: var(--pitch-700);
  padding-block: 42px 52px;
}

.page-faq .faq-steps__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-steps__list li {
  background: var(--pitch-900);
  padding: 20px 20px 22px;
}

.page-faq .faq-step__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--signal-orange);
}

.page-faq .faq-steps__list h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-faq .faq-steps__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--cool-slate);
}

.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--pitch-900);
  overflow: hidden;
}

.page-faq .faq-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .faq-figure--wide { aspect-ratio: 12 / 7; }
.page-faq .faq-figure--square { aspect-ratio: 5 / 4; }

.page-faq .faq-group__figure { margin: 18px 0 6px; }

/* --- 问答主区 --- */

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-block: 42px 68px;
}

.page-faq .faq-toc { display: none; }

.page-faq .faq-toc__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cool-slate);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

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

.page-faq .faq-toc__list a {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 12px 8px 12px 12px;
  border-left: 2px solid transparent;
  color: var(--cool-slate);
  font-size: 13px;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-toc__list a:hover,
.page-faq .faq-toc__list a:focus-visible {
  color: var(--paper);
  border-left-color: var(--signal-orange);
  background: rgba(255, 107, 26, 0.08);
}

.page-faq .faq-toc__code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--signal-orange);
}

.page-faq .faq-toc__count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
}

/* --- 工具条 --- */

.page-faq .faq-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--line-strong);
}

.page-faq .faq-toolbar__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cool-slate);
}

.page-faq .faq-toolbar__label .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--signal-orange);
}

/* --- 分组 --- */

.page-faq .faq-group {
  padding-top: 38px;
  scroll-margin-top: 24px;
}

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

.page-faq .faq-group__badge {
  flex: none;
  padding: 5px 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1;
  color: var(--faq-warn-ink);
  background: var(--cool-slate);
}

.page-faq .faq-group__badge--nav { background: var(--signal-orange); }
.page-faq .faq-group__badge--data { background: var(--warning-yellow); }
.page-faq .faq-group__badge--screen { background: var(--cool-slate); }
.page-faq .faq-group__badge--contact { background: var(--paper); }

.page-faq .faq-group__title {
  margin: 0;
  font-size: 19px;
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-group__note {
  margin: 0 0 0 auto;
  font-size: 12px;
  color: var(--cool-slate);
}

/* --- 问答条目 --- */

.page-faq .faq-list {
  margin: 0;
  padding: 0;
}

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

.page-faq .faq-item summary {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 16px;
  gap: 10px;
  align-items: center;
  padding: 15px 2px;
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease);
}

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

.page-faq .faq-item summary:hover {
  background: rgba(255, 107, 26, 0.06);
}

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

.page-faq .faq-item__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
  color: var(--cool-slate);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item__q {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--paper);
}

.page-faq .faq-item__mark {
  position: relative;
  justify-self: end;
  width: 14px;
  height: 14px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--cool-slate);
  transition: background var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__mark::before { inset: 6px 0; }
.page-faq .faq-item__mark::after { inset: 0 6px; opacity: 1; }

.page-faq .faq-item[open] .faq-item__mark::before { background: var(--signal-orange); }
.page-faq .faq-item[open] .faq-item__mark::after { opacity: 0; }
.page-faq .faq-item[open] .faq-item__num { color: var(--signal-orange); }

.page-faq .faq-item__body {
  padding: 0 2px 20px 42px;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--cool-slate);
}

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

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--signal-orange);
}

/* --- 联系卡片 --- */

.page-faq .faq-contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 24px;
  padding: 22px 20px;
  border: 1px solid var(--line-strong);
  background: var(--indigo-800);
}

.page-faq .faq-contact-card__k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cool-slate);
}

.page-faq .faq-contact-card__v {
  margin: 0;
  font-size: 14px;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-faq .faq-crosslinks {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.9;
  color: var(--cool-slate);
}

.page-faq .faq-crosslinks a {
  color: var(--signal-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 26, 0.45);
  transition: border-color var(--dur) var(--ease);
}

.page-faq .faq-crosslinks a:hover,
.page-faq .faq-crosslinks a:focus-visible {
  border-bottom-color: var(--signal-orange);
}

/* --- 响应式 --- */

@media (max-width: 560px) {
  .page-faq .faq-item__body {
    padding-left: 0;
  }

  .page-faq .faq-item summary {
    grid-template-columns: 28px minmax(0, 1fr) 16px;
    gap: 8px;
  }

  .page-faq .faq-hero__count {
    padding-left: 12px;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-contact-card {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-steps__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: 40px;
    align-items: start;
  }

  .page-faq .faq-group__figure {
    margin-top: 22px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(200px, 0.72fr);
    column-gap: 48px;
    row-gap: 28px;
    padding-block: 44px 56px;
  }

  .page-faq .faq-hero__lead { grid-column: 1; grid-row: 1; }

  .page-faq .faq-hero__count {
    grid-column: 2;
    grid-row: 1;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    padding-left: 0;
    padding-right: 16px;
    border-left: 0;
    border-right: 3px solid var(--signal-orange);
  }

  .page-faq .faq-hero__tags {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .page-faq .faq-steps {
    padding-block: 52px 64px;
  }
}

@media (min-width: 1240px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
    column-gap: 44px;
    align-items: start;
  }

  .page-faq .faq-toc {
    display: block;
    position: sticky;
    top: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: 0.01ms !important;
  }
}