.page-faq {
  position: relative;
  --faq-radius: 8px;
  --faq-gap: 24px;
  padding-bottom: 64px;
}

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

.page-faq .breadcrumb {
  padding-top: 24px;
}

/* ============ 首屏标题区 ============ */
.page-faq .faq-hero {
  position: relative;
  padding: 36px 0 48px;
  border-bottom: 1px solid var(--c-border);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.10) 0%, transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero__intro {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin: 8px 0 16px;
}

.page-faq .faq-hero__title h1 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 8vw, 4.2rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.1;
  text-transform: uppercase;
  margin: 0;
}

.page-faq .faq-hero__note {
  writing-mode: vertical-rl;
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--c-muted);
  text-transform: uppercase;
  opacity: 0.8;
}

.page-faq .faq-hero__desc {
  max-width: 620px;
  color: var(--c-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  margin: 0;
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-stat {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--faq-radius);
  padding: 16px 8px;
  text-align: center;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.14);
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-data);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-green);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 0.72rem;
  color: var(--c-muted);
  letter-spacing: 0.08em;
}

/* ============ 通用区块标题 ============ */
.page-faq .faq-quick,
.page-faq .faq-categories {
  padding: 48px 0;
  border-bottom: 1px solid var(--c-border);
}

.page-faq .section-title {
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
  font-size: 1.5rem;
  color: var(--c-text);
}

.page-faq .section-subtitle {
  margin: 6px 0 0;
  color: var(--c-muted);
  font-size: 0.86rem;
}

/* ============ 快速帮助 ============ */
.page-faq .faq-quick__layout {
  display: grid;
  gap: var(--faq-gap);
  margin-top: 28px;
}

.page-faq .faq-quick__icon {
  background: linear-gradient(150deg, rgba(0, 255, 135, 0.06), transparent 55%), var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-faq .faq-quick__icon img {
  width: 100%;
  height: auto;
  max-width: 220px;
  border-radius: var(--faq-radius);
  object-fit: cover;
}

.page-faq .faq-quick__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ============ 手风琴条目 ============ */
.page-faq .faq-item {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--faq-radius);
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.16);
}

.page-faq .faq-item > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 46px 14px 16px;
  position: relative;
  color: var(--c-text);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.92rem;
  line-height: 1.5;
  transition: color 0.2s, background 0.2s;
}

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

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  background: var(--c-green-dim);
  color: var(--c-green);
}

.page-faq .faq-item > summary::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  font-family: var(--font-data);
  font-size: 1.1rem;
  line-height: 1;
  color: var(--c-green);
  background: rgba(0, 255, 135, 0.06);
  transition: background 0.2s, color 0.2s;
}

.page-faq .faq-item[open] > summary::after {
  content: "−";
  background: var(--c-green);
  color: var(--c-bg);
}

.page-faq .faq-item__content {
  padding: 2px 16px 18px;
  color: var(--c-muted);
  font-size: 0.88rem;
}

.page-faq .faq-item__content p {
  margin: 0 0 10px;
  line-height: 1.75;
}

.page-faq .faq-item__content a {
  color: var(--c-blue);
  text-decoration: none;
}

.page-faq .faq-item__content a:hover {
  color: var(--c-green);
}

.page-faq .faq-item--hot > summary {
  padding-left: 18px;
  font-weight: 600;
}

.page-faq .faq-item--hot > summary::before {
  content: "";
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--c-red);
  box-shadow: 0 0 8px rgba(255, 59, 48, 0.7);
}

.page-faq .faq-quick__list .faq-item__content .btn {
  margin-top: 4px;
}

/* ============ 问题分类布局 ============ */
.page-faq .faq-cat-layout {
  display: grid;
  gap: var(--faq-gap);
  margin-top: 28px;
}

.page-faq .faq-cat-index {
  position: relative;
  background: linear-gradient(160deg, rgba(0, 255, 135, 0.05), transparent 40%), var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--faq-radius);
  padding: 20px 18px;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.16);
}

.page-faq .faq-cat-index__label {
  font-family: var(--font-data);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border);
}

.page-faq .faq-cat-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-faq .faq-cat-link {
  display: block;
  padding: 10px 12px;
  border-radius: 4px;
  color: var(--c-muted);
  text-decoration: none;
  font-size: 0.9rem;
  border-left: 2px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.page-faq .faq-cat-link:hover,
.page-faq .faq-cat-link:focus-visible {
  color: var(--c-green);
  background: var(--c-green-dim);
  border-left-color: var(--c-green);
}

/* ============ 分类分组 ============ */
.page-faq .faq-cat-groups {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 32px;
}

.page-faq .faq-group__header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 14px;
}

.page-faq .faq-group__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  background: rgba(255, 59, 48, 0.08);
  font-family: var(--font-data);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-red);
}

.page-faq .faq-group__title {
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0;
}

.page-faq .faq-group__items {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ============ 设备兼容示意图 ============ */
.page-faq .faq-device-media {
  margin: 0 0 14px;
  padding: 0;
}

.page-faq .faq-device-media img {
  width: 100%;
  height: auto;
  border-radius: var(--faq-radius);
  border: 1px solid var(--c-border);
  display: block;
  object-fit: cover;
}

/* ============ 联系支持 ============ */
.page-faq .faq-contact {
  margin-top: 48px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 28px 22px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.page-faq .faq-contact::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-green), var(--c-blue));
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.page-faq .faq-contact__info,
.page-faq .faq-contact__links {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--c-border);
  border-radius: var(--faq-radius);
  padding: 18px;
}

.page-faq .faq-contact__note {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-green);
  font-weight: 700;
}

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

.page-faq .contact-list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.88rem;
  color: var(--c-text);
}

.page-faq .contact-list li:last-child {
  border-bottom: none;
}

.page-faq .contact-list strong {
  min-width: 48px;
  color: var(--c-muted);
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
}

.page-faq .faq-contact__tip {
  margin: 12px 0 0;
  font-size: 0.82rem;
  color: var(--c-muted);
  line-height: 1.6;
}

.page-faq .faq-contact__links p {
  margin: 0;
  color: var(--c-text);
  font-weight: 500;
  font-size: 0.9rem;
}

.page-faq .faq-contact__links ul {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .faq-contact__links a {
  display: inline-block;
  color: var(--c-blue);
  text-decoration: none;
  font-size: 0.88rem;
  padding-left: 14px;
  border-left: 2px solid var(--c-border);
  transition: color 0.2s, border-color 0.2s, padding-left 0.2s;
}

.page-faq .faq-contact__links a:hover {
  color: var(--c-green);
  border-left-color: var(--c-green);
  padding-left: 18px;
}

.page-faq .faq-contact__trust {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--c-border);
  color: var(--c-muted);
  font-size: 0.82rem;
  line-height: 1.6;
}

/* ============ 桌面端 ============ */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
    gap: 32px;
    align-items: center;
    padding: 56px 0 64px;
  }

  .page-faq .faq-hero__stats {
    margin-top: 0;
  }

  .page-faq .faq-quick__layout {
    grid-template-columns: minmax(200px, 260px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-quick__icon img {
    max-width: 240px;
  }

  .page-faq .faq-cat-layout {
    grid-template-columns: minmax(200px, 260px) minmax(0, 1fr);
    align-items: start;
    gap: 32px;
  }

  .page-faq .faq-cat-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 20px;
  }
}

/* ============ 小屏适配 ============ */
@media (max-width: 480px) {
  .page-faq .faq-stat__num {
    font-size: 1.15rem;
  }

  .page-faq .faq-contact {
    padding: 24px 16px;
  }

  .page-faq .faq-item > summary {
    font-size: 0.88rem;
  }
}