/* ==========================================================
   支持中心 FAQ — 技术文档手册式页面专属样式
   作用域：.page-faq
   ========================================================== */

.page-faq {
  --faq-toc-w: 264px;
  --faq-gap: 56px;
  --faq-answer-bg: #181818;
  --faq-answer-bl: #7a1e1e;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 28px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.page-faq .breadcrumbs__link {
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-faq .breadcrumbs__link:hover {
  color: var(--text);
}

.page-faq .breadcrumbs__sep {
  color: var(--line-strong);
}

.page-faq .breadcrumbs__current {
  color: var(--text);
}

/* ---------- 页首 ---------- */
.page-faq .page-head {
  position: relative;
  overflow: hidden;
  padding: 40px 0 44px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .page-head::before {
  content: "FAQ";
  position: absolute;
  top: -28px;
  right: 0;
  z-index: 0;
  font-family: var(--font-head);
  font-size: 128px;
  line-height: 1;
  color: rgba(255, 42, 77, 0.05);
  pointer-events: none;
  user-select: none;
}

.page-faq .page-head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 96px;
  height: 3px;
  background: var(--red);
  z-index: 1;
}

.page-faq .page-head__meta,
.page-faq .page-head__title,
.page-faq .page-head__desc {
  position: relative;
  z-index: 1;
}

.page-faq .page-head__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.page-faq .page-head__num {
  display: inline-block;
  padding: 4px 10px;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .page-head__status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}

.page-faq .faq-page-head__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
  box-shadow: 0 0 8px rgba(255, 42, 77, 0.6);
  animation: page-faq-blink 1.4s ease-in-out infinite;
}

@keyframes page-faq-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.page-faq .page-head__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-faq .page-head__desc {
  max-width: 780px;
  margin: 16px 0 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 编号速查条 ---------- */
.page-faq .faq-quickref {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
  padding: 14px 16px;
  margin: 0 0 48px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  font-family: var(--font-mono);
}

.page-faq .faq-quickref__label {
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.page-faq .faq-quickref__code {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--gold);
  background: var(--bg);
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
}

.page-faq .faq-quickref__note {
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- 主布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-bottom: 80px;
}

.page-faq .faq-toc {
  order: 1;
  min-width: 0;
}

.page-faq .faq-content {
  order: 2;
  min-width: 0;
}

/* ---------- 左侧目录 / 移动端横向索引条 ---------- */
.page-faq .faq-toc__inner {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  padding: 16px 18px;
}

.page-faq .faq-toc__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.page-faq .faq-toc__nav {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line-strong) transparent;
}

.page-faq .faq-toc__nav::-webkit-scrollbar {
  height: 4px;
}

.page-faq .faq-toc__nav::-webkit-scrollbar-thumb {
  background: var(--line-strong);
}

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  background: var(--bg);
  border: 1px solid var(--line);
  white-space: nowrap;
  text-decoration: none;
  font-family: var(--font-head);
  font-size: 13px;
  color: var(--text-dim);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-toc__link:hover {
  color: var(--text);
  border-color: var(--red);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--red);
}

.page-faq .faq-toc__note {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  color: var(--text-dim);
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  margin-bottom: 56px;
  scroll-margin-top: 80px;
}

.page-faq .faq-section__title {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 24px;
  font-weight: 400;
  color: var(--text);
}

.page-faq .faq-section__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  background: var(--red);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 13px;
}

.page-faq .faq-section__desc {
  margin: 0 0 24px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-dim);
}

/* ---------- 示意图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 28px;
  max-width: 460px;
  padding: 10px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--purple);
}

.page-faq .faq-figure__img {
  display: block;
  width: 100%;
  max-width: 400px;
  height: auto;
  margin: 0 auto;
  border: 1px solid var(--line-strong);
  filter: grayscale(0.35) contrast(1.05);
}

.page-faq .faq-figure__cap {
  margin: 8px 0 0;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
}

/* ---------- 手风琴 ---------- */
.page-faq .accordion {
  border-top: 1px solid var(--line);
}

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

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

.page-faq .accordion__btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 20px 12px;
  background: transparent;
  border: none;
  border-radius: 0;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  transition: background-color 0.2s ease;
}

.page-faq .accordion__btn::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--red);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.page-faq .accordion__btn:hover,
.page-faq .accordion__btn:focus-visible {
  background: var(--panel);
}

.page-faq .accordion__btn:hover::after,
.page-faq .accordion__btn[aria-expanded="true"]::after {
  opacity: 1;
}

.page-faq .faq-q__num {
  flex-shrink: 0;
  display: inline-block;
  padding: 4px 8px;
  background: var(--panel);
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-q:hover .faq-q__num {
  background-color: var(--red);
  color: #fff;
}

.page-faq .faq-q__text {
  flex: 1;
  min-width: 0;
}

.page-faq .accordion__icon {
  flex-shrink: 0;
  width: 10px;
  height: 10px;
  margin-right: 6px;
  border-right: 2px solid var(--red);
  border-bottom: 2px solid var(--red);
  transform: rotate(45deg);
  transition: transform 0.3s ease;
}

.page-faq .accordion__btn[aria-expanded="true"] .accordion__icon {
  transform: rotate(225deg);
}

.page-faq .accordion__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.page-faq .accordion__item:has(.accordion__btn[aria-expanded="true"]) .accordion__panel {
  max-height: 600px;
}

.page-faq .accordion__content {
  padding: 16px 20px;
  margin: 0 12px 24px;
  background: var(--faq-answer-bg);
  border: 1px solid var(--line);
  border-left: 3px solid var(--faq-answer-bl);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-dim);
}

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

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

/* ---------- 行内链接 ---------- */
.page-faq .faq-inline-link {
  color: var(--green);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.2s ease;
}

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

/* ---------- 联系支持 ---------- */
.page-faq .faq-section--contact {
  padding: 28px 24px 32px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--red);
}

.page-faq .faq-contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-contact__body {
  flex: 1;
  min-width: 0;
}

.page-faq .faq-contact__body > p:first-child {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 15px;
  color: var(--text);
}

.page-faq .faq-contact ul {
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-faq .faq-contact li {
  position: relative;
  padding: 5px 0 5px 24px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dim);
}

.page-faq .faq-contact li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 13px;
  width: 6px;
  height: 6px;
  background: var(--red);
  transform: rotate(45deg);
}

.page-faq .faq-contact__note {
  margin: 0 0 18px;
  padding: 10px 12px;
  border-left: 3px solid var(--gold);
  background: var(--bg);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-faq .faq-contact .btn--solid {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--red);
  color: #fff;
  text-decoration: none;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-contact .btn--solid:hover {
  background: #ff4a6d;
  transform: translateY(-2px);
}

.page-faq .faq-contact .btn--solid::after {
  content: " →";
  font-family: var(--font-mono);
  font-size: 16px;
}

.page-faq .faq-contact__arrow {
  width: 44px;
  height: 32px;
  flex-shrink: 0;
  align-self: center;
}

/* ---------- 桌面端：文档双栏布局 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-toc-w) 1fr;
    gap: var(--faq-gap);
    align-items: start;
  }

  .page-faq .faq-toc__inner {
    position: sticky;
    top: 24px;
    padding: 20px;
  }

  .page-faq .faq-toc__nav {
    flex-direction: column;
    gap: 0;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-toc__link {
    justify-content: space-between;
    padding: 12px 0;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    white-space: normal;
    font-size: 14px;
  }

  .page-faq .faq-toc__link:hover {
    border-color: var(--red);
  }

  .page-faq .faq-section__desc {
    padding-left: 50px;
  }

  .page-faq .faq-figure {
    margin: 0 0 32px 50px;
  }

  .page-faq .accordion__btn {
    padding: 20px 12px 20px 50px;
  }

  .page-faq .accordion__content {
    margin-left: 50px;
    margin-right: 0;
  }

  .page-faq .faq-contact__arrow {
    width: 120px;
    height: 40px;
  }
}