/* ===== FAQ 页面专属样式 ===== */
.page-faq {
  --faq-space: clamp(3rem, 7vw, 5.5rem);
  --faq-frame: var(--line);
  overflow: clip;
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.04) 0%, transparent 42%),
    linear-gradient(315deg, rgba(198, 255, 0, 0.03) 0%, transparent 58%);
}

/* ===== Hero 区 ===== */
.page-faq__hero {
  position: relative;
  border-bottom: 1px solid var(--faq-frame);
  background:
    linear-gradient(90deg, rgba(30, 58, 79, 0.36) 1px, transparent 1px),
    linear-gradient(rgba(30, 58, 79, 0.24) 1px, transparent 1px);
  background-size: 28px 28px;
  background-color: var(--bg);
  padding: clamp(2.25rem, 5vw, 4rem) 0 2.5rem;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--green) 0 56px, var(--cyan) 56px 112px, var(--orange) 112px 168px);
  opacity: 0.85;
}

.page-faq__eyebrow {
  display: inline-block;
  margin: 1.1rem 0 0.9rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq__title {
  margin: 0 0 0.9rem;
  font-family: var(--font-headline);
  font-size: clamp(2.55rem, 7vw, 4.8rem);
  line-height: 0.95;
  letter-spacing: 0.015em;
  text-transform: uppercase;
}

.page-faq__title-sub {
  display: block;
  margin-top: 0.7rem;
  font-size: 0.46em;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-transform: none;
}

.page-faq__lead {
  max-width: 42rem;
  margin: 0 0 1.4rem;
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq__search-wrap {
  display: flex;
  max-width: 34rem;
  border: 1px solid var(--faq-frame);
  background: var(--bg-panel);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.page-faq__search-wrap:focus-within {
  border-color: var(--green);
  box-shadow: 0 0 0 1px var(--green);
}

.page-faq__search-input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  padding: 0.85rem 1rem;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.92rem;
  outline: none;
}

.page-faq__search-input::placeholder {
  color: var(--muted);
}

.page-faq__meta {
  margin-top: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
  letter-spacing: 0.03em;
}

/* ===== 主体布局 ===== */
.page-faq__layout {
  display: block;
  padding-top: 2rem;
  padding-bottom: var(--faq-space);
}

.page-faq__sidebar {
  margin-bottom: 1.6rem;
}

.page-faq__index-card {
  border: 1px solid var(--faq-frame);
  background: linear-gradient(180deg, var(--bg-panel), var(--bg));
  padding: 1.1rem 1.2rem 0.9rem;
}

.page-faq__index-title {
  margin: 0 0 0.8rem;
  font-family: var(--font-headline);
  font-size: 1.05rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text);
}

.page-faq__index-title span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--orange);
  letter-spacing: 0.08em;
}

.page-faq__index-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.4rem;
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
}

.page-faq__index-link {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
  border: 1px solid var(--faq-frame);
  padding: 0.42rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease;
}

.page-faq__index-link span {
  color: var(--cyan);
}

.page-faq__index-link:hover {
  border-color: var(--green);
  color: var(--text);
}

.page-faq__index-link:active {
  border-color: var(--orange);
  color: var(--green);
  transform: translateX(2px);
}

.page-faq__index-note {
  margin: 0.7rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--muted);
}

/* ===== 右侧主内容 ===== */
.page-faq__main {
  min-width: 0;
}

.page-faq__note {
  margin: 0 0 2.2rem;
  padding-left: 0.8rem;
  border-left: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.65;
  color: var(--muted);
}

/* ===== 分区 ===== */
.page-faq__section {
  position: relative;
  scroll-margin-top: calc(var(--header-h) + 1rem);
  margin-top: var(--faq-space);
  padding-top: 2.6rem;
  border-top: 1px solid var(--faq-frame);
}

.page-faq__section::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 64px;
  height: 3px;
  background: var(--orange);
}

.page-faq__section:first-of-type {
  margin-top: 0;
}

.page-faq__section-head {
  margin-bottom: 1.7rem;
}

.page-faq__section-label {
  display: inline-block;
  margin-bottom: 0.6rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--line);
  color: var(--orange);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.page-faq__section-title {
  margin: 0.25rem 0 0.4rem;
  font-family: var(--font-headline);
  font-size: clamp(1.55rem, 3.6vw, 2.35rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.page-faq__section-intro {
  margin: 0;
  font-size: 0.94rem;
  color: var(--muted);
}

/* ===== 图片说明块 ===== */
.page-faq__figure {
  margin: 0 0 1.8rem;
  border: 1px solid var(--faq-frame);
  background: var(--bg-panel);
}

.page-faq__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-faq__figure-caption {
  padding: 0.6rem 0.85rem;
  border-top: 1px solid var(--faq-frame);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--muted);
}

/* ===== 手风琴 ===== */
.page-faq__accordion {
  border-bottom: 1px solid var(--faq-frame);
}

.page-faq__item {
  border-top: 1px solid var(--faq-frame);
}

.page-faq__question {
  margin: 0;
}

.page-faq__trigger {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  width: 100%;
  padding: 1.05rem 0;
  border: 0;
  border-bottom: 1px solid transparent;
  background: transparent;
  cursor: pointer;
  color: var(--text);
  text-align: left;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.page-faq__trigger:hover {
  background: rgba(0, 229, 255, 0.05);
}

.page-faq__trigger:active {
  background: rgba(198, 255, 0, 0.06);
}

.page-faq__q-index {
  flex: 0 0 auto;
  min-width: 2.2rem;
  padding: 0.3rem 0.1rem;
  border: 1px solid var(--faq-frame);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1;
  text-align: center;
  color: var(--cyan);
  background: var(--bg-deep);
}

.page-faq__q-text {
  font-family: var(--font-headline);
  font-size: 1.08rem;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.page-faq__q-toggle {
  position: relative;
  display: inline-grid;
  flex: 0 0 auto;
  width: 1.4rem;
  height: 1.4rem;
  margin-left: auto;
  place-items: center;
  border: 1px solid var(--faq-frame);
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--cyan);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.page-faq__q-toggle::after {
  content: "−";
  position: absolute;
  font-family: var(--font-mono);
  color: var(--green);
  opacity: 0;
  transition: opacity 0.15s ease;
}

.page-faq__item.is-open .page-faq__q-toggle {
  color: transparent;
  border-color: var(--green);
}

.page-faq__item.is-open .page-faq__q-toggle::after {
  opacity: 1;
}

.page-faq__pane-inner {
  padding: 0.55rem 0 1.25rem 3.15rem;
  border-bottom: 1px solid var(--line);
}

.page-faq__pane-inner p {
  margin: 0.4rem 0;
  font-size: 0.93rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq__pane-inner a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.page-faq__pane-inner a:hover {
  color: var(--green);
  border-color: var(--green);
}

.page-faq__item.is-open .page-faq__pane-inner {
  border-bottom: 2px solid var(--green);
}

/* ===== 更多链接 ===== */
.page-faq__more {
  margin-top: 1.4rem;
}

/* ===== 联系卡片 ===== */
.page-faq__contact-card {
  margin-top: 2.2rem;
  padding: 1.4rem 1.5rem 1.6rem;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--bg-panel), var(--violet));
}

.page-faq__contact-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-headline);
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text);
}

.page-faq__contact-desc {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-faq__contact-list {
  list-style: none;
  margin: 0 0 1.2rem;
  padding: 0;
  display: grid;
  gap: 0.38rem;
}

.page-faq__contact-list li {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--text);
}

.page-faq__contact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ===== 移动端手风琴内边距适配 ===== */
@media (max-width: 540px) {
  .page-faq__pane-inner {
    padding-left: 2.9rem;
  }

  .page-faq__q-text {
    font-size: 1rem;
  }

  .page-faq__contact-card {
    padding: 1.1rem 1rem 1.3rem;
  }
}

/* ===== 平板及以上 ===== */
@media (min-width: 820px) {
  .page-faq__hero {
    padding: clamp(3rem, 6vw, 5rem) 0 3.5rem;
  }

  .page-faq__layout {
    display: grid;
    grid-template-columns: 230px minmax(0, 1fr);
    gap: clamp(2.75rem, 6vw, 5rem);
    align-items: start;
    padding-top: 3.25rem;
  }

  .page-faq__sidebar {
    margin-bottom: 0;
  }

  .page-faq__index-card {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-faq__index-list {
    flex-direction: column;
    gap: 0.35rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq__index-link {
    justify-content: space-between;
    white-space: normal;
  }

  .page-faq__q-index {
    min-width: 2.3rem;
  }
}