/* ===== 帮助中心页专属样式 ===== */
.page-faq {
  background: var(--off-white);
}

/* ---------- Hero 区域 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(100deg, rgba(255, 255, 255, 0.06) 0 12%, transparent 12.1%),
    var(--deep-teal);
  color: var(--off-white);
  padding: 36px 20px 56px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 220px;
  height: 220px;
  background: var(--yellow);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: 0.9;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -30px;
  right: 12%;
  width: 120px;
  height: 120px;
  border: 3px solid rgba(255, 215, 0, 0.35);
  transform: rotate(18deg);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-faq .faq-hero__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--yellow);
  border-left: 4px solid var(--yellow);
  padding-left: 10px;
  margin: 0 0 14px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-headline);
  font-size: 40px;
  line-height: 1.08;
  letter-spacing: 0.02em;
  margin: 0 0 14px;
  color: var(--off-white);
}

.page-faq .faq-hero__title span {
  display: block;
  color: var(--yellow);
  text-shadow: 3px 3px 0 rgba(51, 51, 51, 0.45);
}

.page-faq .faq-hero__lead {
  font-size: 15px;
  line-height: 1.75;
  color: rgba(245, 245, 240, 0.92);
  max-width: 38em;
  margin: 0 0 18px;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--silver);
  border-top: 1px solid rgba(255, 255, 255, 0.28);
  border-bottom: 1px solid rgba(255, 255, 255, 0.28);
  padding: 10px 0;
  margin-bottom: 16px;
}

.page-faq .faq-hero__meta span::before {
  content: "▰";
  color: var(--yellow);
  margin-right: 6px;
  font-size: 11px;
}

.page-faq .faq-hero__legend .legend__item {
  color: var(--off-white);
}

.page-faq .faq-hero__legend .legend__dot {
  border-color: var(--silver);
}

.page-faq .faq-hero__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-faq .faq-hero__img {
  width: 100%;
  max-width: 420px;
  height: auto;
  display: block;
  border: 4px solid var(--yellow);
  box-shadow: 8px 8px 0 rgba(51, 51, 51, 0.45);
  background: var(--silver-light);
  object-fit: cover;
}

/* ---------- 主布局 ---------- */
.page-faq .faq-body {
  padding: 32px 16px 56px;
}

.page-faq .faq-body__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}

/* ---------- 分类导航 ---------- */
.page-faq .faq-cats__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-text);
  border-bottom: 2px solid var(--silver);
  padding-bottom: 6px;
  margin: 0 0 12px;
}

.page-faq .faq-cats__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-cats__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-cat {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  appearance: none;
  -webkit-appearance: none;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-text);
  background: #ffffff;
  border: var(--border-hard);
  box-shadow: var(--shadow-silver);
  padding: 11px 16px;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-cat__num {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  color: var(--grass-green);
}

.page-faq .faq-cat:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--gray-text);
}

.page-faq .faq-cat:focus-visible,
.page-faq .faq-item__q:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: -3px;
}

.page-faq .faq-cat.is-active,
.page-faq .faq-cat[aria-selected="true"] {
  background: var(--yellow);
  border-color: var(--gray-text);
  box-shadow: var(--shadow-hard);
  transform: translate(-2px, -2px);
}

.page-faq .faq-cat.is-active .faq-cat__num,
.page-faq .faq-cat[aria-selected="true"] .faq-cat__num {
  color: var(--deep-teal);
}

.page-faq .faq-cats__support {
  margin-top: 18px;
  border: 2px dashed var(--accent-red);
  background: #ffffff;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--gray-text);
}

.page-faq .faq-cats__support-label {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-red);
  margin: 0 0 4px;
}

.page-faq .faq-cats__support a {
  color: var(--dark-grass);
  font-weight: 700;
  text-decoration-color: var(--yellow);
  text-decoration-thickness: 3px;
}

.page-faq .faq-cats__support a:hover {
  background: var(--yellow);
}

/* ---------- 面板区 ---------- */
.page-faq .faq-content {
  min-width: 0;
}

.page-faq .faq-panel[hidden],
.page-faq .faq-panel[aria-hidden="true"] {
  display: none;
}

.page-faq .faq-panel__title {
  font-family: var(--font-headline);
  font-size: 30px;
  line-height: 1.15;
  color: var(--gray-text);
  display: inline-block;
  margin: 0 0 6px;
}

.page-faq .faq-panel__title::after {
  content: "";
  display: block;
  height: 8px;
  width: 100%;
  background: var(--yellow);
  margin-top: 2px;
}

.page-faq .faq-panel__intro {
  font-size: 14px;
  line-height: 1.65;
  color: #555555;
  border-left: 3px solid var(--grass-green);
  padding-left: 12px;
  margin: 0 0 18px;
}

/* ---------- 手风琴条目 ---------- */
.page-faq .faq-item {
  border: var(--border-hard);
  box-shadow: 4px 4px 0 rgba(51, 51, 51, 0.16);
  background: #ffffff;
  margin-bottom: 14px;
  transition: box-shadow 0.22s ease, transform 0.22s ease;
}

.page-faq .faq-item[open] {
  box-shadow: var(--shadow-hard);
  transform: translate(-2px, -2px);
}

.page-faq .faq-item__q {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 16px;
  cursor: pointer;
  font-weight: 700;
  font-size: 15px;
  line-height: 1.4;
  color: var(--gray-text);
  user-select: none;
  transition: background-color 0.18s ease;
}

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

.page-faq .faq-item__q:hover {
  background: var(--silver-light);
}

.page-faq .faq-item__mark {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border: 2px solid var(--gray-text);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  position: relative;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-item__mark::before {
  content: "+";
}

.page-faq .faq-item[open] .faq-item__mark {
  background: var(--yellow);
  transform: rotate(180deg);
}

.page-faq .faq-item[open] .faq-item__mark::before {
  content: "×";
}

.page-faq .faq-item__a {
  border-top: 2px dashed var(--silver-light);
  padding: 14px 16px 16px;
  font-size: 14px;
  line-height: 1.75;
  color: #444444;
}

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

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

.page-faq .faq-link,
.page-faq .faq-item__a a {
  color: var(--gray-text);
  font-weight: 700;
  text-decoration: none;
  background-image: linear-gradient(var(--yellow), var(--yellow));
  background-size: 100% 40%;
  background-repeat: no-repeat;
  background-position: 0 90%;
  padding: 0 2px;
  border-bottom: 2px solid var(--gray-text);
  transition: background-size 0.2s ease;
}

.page-faq .faq-link:hover,
.page-faq .faq-item__a a:hover {
  background-size: 100% 100%;
}

/* ---------- 安装指引块 ---------- */
.page-faq .faq-install {
  margin-top: 24px;
  border: var(--border-hard);
  box-shadow: var(--shadow-hard);
  background: var(--silver-light);
  padding: 18px 16px;
}

.page-faq .faq-install__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--dark-grass);
  margin: 0 0 10px;
}

.page-faq .faq-install__list {
  margin: 0 0 16px;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--gray-text);
}

.page-faq .faq-install__list li::marker {
  color: var(--grass-green);
  font-weight: 700;
}

.page-faq .faq-install__img {
  width: 100%;
  height: auto;
  display: block;
  border: var(--border-hard);
  box-shadow: var(--shadow-silver);
  background: var(--silver-light);
  object-fit: cover;
}

/* ---------- 延伸入口块 ---------- */
.page-faq .faq-more {
  margin-top: 22px;
  background: var(--deep-teal);
  color: var(--off-white);
  border: var(--border-hard);
  box-shadow: var(--shadow-hard);
  padding: 14px 18px;
  font-size: 14px;
  line-height: 1.6;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

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

.page-faq .faq-more a {
  color: var(--yellow);
  font-weight: 700;
  text-decoration-thickness: 2px;
}

.page-faq .faq-more a:hover {
  background: rgba(255, 215, 0, 0.18);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 992px) {
  .page-faq .faq-hero {
    padding: 64px 32px 84px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
  }

  .page-faq .faq-hero__title {
    font-size: 62px;
  }

  .page-faq .faq-hero__lead {
    font-size: 16px;
  }

  .page-faq .faq-hero__img {
    max-width: 600px;
  }

  .page-faq .faq-hero__visual::before {
    content: "FAQ // 索引";
    position: absolute;
    left: -12px;
    top: 6px;
    z-index: 2;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.22em;
    color: var(--yellow);
    background: var(--deep-teal);
    border: var(--border-hard);
    padding: 6px 4px;
  }

  .page-faq .faq-body {
    padding: 48px 24px 80px;
  }

  .page-faq .faq-body__inner {
    grid-template-columns: 272px 1fr;
    gap: 44px;
  }

  .page-faq .faq-cats {
    position: sticky;
    top: 24px;
  }

  .page-faq .faq-cats__list {
    flex-direction: column;
    gap: 10px;
    overflow-x: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-cat {
    width: 100%;
    justify-content: flex-start;
    padding: 15px 18px;
    font-size: 15px;
  }

  .page-faq .faq-panel__title {
    font-size: 40px;
  }

  .page-faq .faq-panel__intro {
    font-size: 15px;
  }

  .page-faq .faq-item__q {
    padding: 18px 20px;
    font-size: 16px;
  }

  .page-faq .faq-item__a {
    padding: 16px 20px 18px;
    font-size: 15px;
  }

  .page-faq .faq-install {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
    align-items: center;
  }

  .page-faq .faq-install__list {
    margin-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-cat,
  .page-faq .faq-item__mark {
    transition: none;
  }
}