/* ===== 页面级：帮助中心 / FAQ ===== */
.page-faq {
  background: var(--c-dark);
  color: var(--c-white);
  overflow-x: hidden;
}

.page-faq .breadcrumb {
  padding: 20px 0 4px;
  border-bottom: 1px solid rgba(46, 91, 159, 0.35);
  margin-bottom: 8px;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.page-faq .breadcrumb__link {
  color: var(--c-muted);
  text-decoration: none;
  transition: color var(--transition);
}

.page-faq .breadcrumb__link:hover {
  color: var(--c-orange);
}

.page-faq .breadcrumb__sep {
  color: var(--c-edge);
  margin-left: 8px;
}

.page-faq .breadcrumb__current {
  color: var(--c-green);
}

.page-faq__hero {
  position: relative;
  padding: 32px 0 56px;
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -8%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(57, 255, 20, 0.14), transparent 62%);
  pointer-events: none;
}

.page-faq__hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.page-faq__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--c-green);
  text-transform: uppercase;
}

.page-faq__eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 2px;
  background: var(--c-orange);
}

.page-faq__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.2vw, 2.8rem);
  line-height: 1.18;
  letter-spacing: 0.02em;
}

.page-faq__accent {
  color: var(--c-orange);
  white-space: nowrap;
}

.page-faq__lead {
  max-width: 56ch;
  margin-bottom: 22px;
  color: var(--c-muted);
  font-size: 15px;
  line-height: 1.8;
}

.page-faq__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq__tag {
  padding: 8px 14px;
  background: var(--c-card);
  border: 1px solid var(--c-edge);
  color: var(--c-white);
  font-family: var(--font-data);
  font-size: 13px;
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
}

.page-faq__tag:hover {
  border-color: var(--c-green);
  color: var(--c-green);
  transform: translateY(-2px);
}

.page-faq__hero-media {
  position: relative;
}

.page-faq__hero-media::before {
  content: "";
  position: absolute;
  right: -14px;
  bottom: -14px;
  width: 100%;
  height: 100%;
  border: 1px solid var(--c-green);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  z-index: 0;
}

.page-faq__hero-img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(1.1) contrast(1.02);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-faq__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: 72px;
}

.page-faq__index-inner {
  position: relative;
  padding: 24px 22px;
  background: linear-gradient(180deg, rgba(6, 18, 43, 0.95), rgba(13, 42, 74, 0.55));
  border: 1px solid var(--c-edge);
}

.page-faq__index-inner::after {
  content: "FAQ";
  position: absolute;
  right: 16px;
  top: 16px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: rgba(178, 196, 222, 0.45);
}

.page-faq__index-label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-green);
}

.page-faq__index-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-size: 22px;
}

.page-faq__index-list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq__index-item a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 10px;
  border-left: 2px solid transparent;
  color: var(--c-muted);
  font-size: 14px;
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.page-faq__index-item a:hover {
  border-left-color: var(--c-orange);
  background: rgba(28, 58, 110, 0.4);
  color: var(--c-white);
}

.page-faq__index-num {
  min-width: 24px;
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--c-orange);
}

.page-faq__index-note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed rgba(46, 91, 159, 0.6);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-green);
}

.page-faq__content {
  display: grid;
  gap: 64px;
  min-width: 0;
}

.page-faq__group,
.page-faq__group--contact {
  scroll-margin-top: 120px;
}

.page-faq__group-head {
  position: relative;
  margin-bottom: 26px;
  padding-left: 14px;
}

.page-faq__group-head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  background: var(--c-orange);
}

.page-faq__group-head .section__tag {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-green);
}

.page-faq__group-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 24px;
}

.page-faq__group-desc {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.7;
}

.page-faq__qa {
  display: grid;
  gap: 12px;
}

.page-faq__item {
  background: var(--c-card);
  border: 1px solid var(--c-edge);
  border-left-width: 3px;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.page-faq__item[open] {
  background: rgba(13, 42, 74, 0.85);
  border-left-color: var(--c-green);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

.page-faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0;
  padding: 18px 18px 18px 20px;
  list-style: none;
  color: var(--c-white);
  cursor: pointer;
  user-select: none;
}

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

.page-faq__question h3 {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
}

.page-faq__question::after {
  content: "+";
  flex-shrink: 0;
  font-family: var(--font-data);
  font-size: 20px;
  line-height: 1;
  color: var(--c-orange);
  transition: transform 0.3s ease, color 0.3s ease;
}

.page-faq__item[open] .page-faq__question::after {
  transform: rotate(45deg);
  color: var(--c-green);
}

.page-faq__item[open] .page-faq__question:hover {
  background: rgba(28, 58, 110, 0.25);
}

.page-faq__answer {
  margin: 0;
  padding: 16px 20px 20px 24px;
  border-top: 1px solid rgba(46, 91, 159, 0.45);
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.85;
}

.page-faq__answer p {
  margin: 0;
}

.page-faq__answer a {
  color: var(--c-green);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq__answer a:hover {
  color: var(--c-orange);
}

.page-faq__contact-box {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  background: linear-gradient(135deg, rgba(6, 18, 43, 0.9), rgba(10, 31, 68, 0.7));
  border: 1px solid var(--c-edge);
}

.page-faq__contact-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-green), var(--c-orange));
}

.page-faq__contact-info {
  padding: 28px 24px;
}

.page-faq__contact-line {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 12px;
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: 14px;
}

.page-faq__contact-label {
  color: var(--c-muted);
}

.page-faq__contact-value {
  color: var(--c-white);
}

.page-faq__contact-value a {
  color: var(--c-green);
  text-decoration: none;
}

.page-faq__contact-value a:hover {
  color: var(--c-orange);
}

.page-faq__contact-meta {
  margin: 18px 0 20px;
  padding-left: 2px;
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.8;
}

.page-faq__contact-info .btn--ghost {
  margin-top: 6px;
}

.page-faq__contact-media {
  min-width: 0;
  background: var(--c-darker);
}

.page-faq__contact-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.02);
}

@media (min-width: 768px) {
  .page-faq__hero {
    padding: 48px 0 72px;
  }

  .page-faq__hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 56px;
  }

  .page-faq__body {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq__index-inner {
    position: sticky;
    top: 128px;
    margin-top: 12px;
  }

  .page-faq__group-title {
    font-size: 28px;
  }

  .page-faq__contact-box {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .page-faq__contact-info {
    padding: 32px 32px;
  }

  .page-faq__contact-img {
    aspect-ratio: auto;
  }
}

@media (min-width: 1024px) {
  .page-faq__hero-grid {
    gap: 72px;
  }

  .page-faq__hero-copy {
    padding-left: 24px;
    border-left: 1px solid rgba(46, 91, 159, 0.5);
  }

  .page-faq__body {
    gap: 72px;
  }

  .page-faq__content {
    gap: 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq__tag,
  .page-faq__item,
  .page-faq__question::after,
  .page-faq__index-item a {
    transition: none;
  }
}