.page-faq {
  --faq-num-color: var(--c-titan);
  background: var(--c-cloud);
  color: var(--c-deep-blue);
}

/* ===== Hero ===== */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--c-deep-blue);
  background-image: linear-gradient(135deg, var(--c-deep-blue), var(--c-deep-blue-2) 55%, var(--c-deep-blue-3));
  color: var(--c-white);
  padding: 2rem 0 2.75rem;
  border-bottom: 4px solid var(--c-gold);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.page-faq .faq-hero .breadcrumb {
  margin-bottom: 1.5rem;
  font-size: var(--fs-sm);
}

.page-faq .faq-hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

.page-faq .faq-hero .breadcrumb a:hover {
  border-color: var(--c-gold);
}

.page-faq .faq-hero__kicker {
  font-family: var(--font-number);
  font-size: var(--fs-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 0.75rem;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 900;
  line-height: 1.15;
  margin: 0 0 0.5rem;
}

.page-faq .faq-hero__sub {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--c-gold);
  margin: 0 0 1rem;
}

.page-faq .faq-hero__desc {
  font-size: var(--fs-body);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.75);
  max-width: 34em;
  margin-bottom: 1.5rem;
}

.page-faq .faq-search {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--c-white);
  border: 2px solid var(--c-deep-blue);
  border-radius: var(--radius-none);
  box-shadow: var(--shadow-heavy);
  max-width: 460px;
}

.page-faq .faq-search__icon {
  position: relative;
  width: 18px;
  height: 18px;
  margin-left: 1rem;
  flex-shrink: 0;
}

.page-faq .faq-search__icon::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 12px;
  height: 12px;
  border: 2px solid var(--c-deep-blue);
  border-radius: 50%;
}

.page-faq .faq-search__icon::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 1px;
  width: 6px;
  height: 2px;
  background: var(--c-deep-blue);
  transform: rotate(45deg);
}

.page-faq .faq-search__input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--c-deep-blue);
  outline: none;
  min-width: 0;
}

.page-faq .faq-search__input::placeholder {
  color: var(--c-titan);
}

.page-faq .faq-hero__stream {
  position: absolute;
  right: -5%;
  top: 15%;
  width: 60%;
  height: 80px;
  opacity: 0.5;
  z-index: 1;
  animation: page-faq-stream-drift 12s ease-in-out infinite alternate;
}

@keyframes page-faq-stream-drift {
  from {
    transform: translateX(0) scaleX(1);
  }
  to {
    transform: translateX(-12px) scaleX(1.05);
  }
}

/* ===== 主体网格 ===== */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  padding-top: 2rem;
  padding-bottom: 4rem;
  align-items: start;
}

/* ===== 侧边索引栏 ===== */
.page-faq .faq-sidebar {
  background: var(--c-white);
  border: 2px solid var(--c-deep-blue);
  box-shadow: var(--shadow-heavy);
  padding: 1.25rem;
  border-radius: var(--radius-none);
}

.page-faq .faq-sidebar__media {
  margin-bottom: 1.25rem;
}

.page-faq .faq-sidebar__media img {
  width: 100%;
  height: 150px;
  object-fit: cover;
  display: block;
}

.page-faq .faq-sidebar__nav {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  scrollbar-width: none;
}

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

.page-faq .faq-sidebar__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.9rem;
  background: var(--c-cloud);
  border: 2px solid var(--c-deep-blue);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--c-deep-blue);
  text-decoration: none;
  white-space: nowrap;
  border-radius: var(--radius-none);
  transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.page-faq .faq-sidebar__link:hover {
  background: var(--c-deep-blue);
  color: var(--c-white);
  border-color: var(--c-deep-blue);
}

.page-faq .faq-sidebar__dot {
  width: 6px;
  height: 6px;
  background: var(--c-titan);
  border-radius: 50%;
  flex-shrink: 0;
  transition: background 0.3s ease, transform 0.3s ease;
}

.page-faq .faq-sidebar__link:hover .faq-sidebar__dot {
  background: var(--c-orange);
  transform: scale(1.5);
}

.page-faq .faq-sidebar__num {
  font-family: var(--font-number);
  font-size: var(--fs-xs);
  color: var(--c-titan);
  transition: color 0.3s;
}

.page-faq .faq-sidebar__link:hover .faq-sidebar__num {
  color: var(--c-gold);
}

.page-faq .faq-sidebar__foot {
  border-top: 2px solid var(--c-cloud);
  margin-top: 1rem;
  padding-top: 1rem;
}

.page-faq .faq-sidebar__note {
  font-size: var(--fs-xs);
  color: var(--c-titan);
  margin: 0 0 0.75rem;
}

.page-faq .faq-sidebar__btn {
  width: 100%;
}

/* ===== 内容区 ===== */
.page-faq .faq-content {
  display: grid;
  gap: 3.5rem;
}

.page-faq .faq-section {
  position: relative;
}

.page-faq .faq-section__head {
  position: relative;
  margin-bottom: 1.75rem;
  padding-left: 1rem;
  border-left: 4px solid var(--c-orange);
}

.page-faq .faq-section__head .section-marker {
  display: block;
  margin-bottom: 0.4rem;
  font-family: var(--font-number);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--c-orange);
}

.page-faq .faq-section__head h2 {
  font-family: var(--font-headline);
  font-size: var(--fs-h2);
  font-weight: 900;
  line-height: 1.2;
  margin: 0 0 0.3rem;
}

.page-faq .faq-section__head p {
  margin: 0;
  font-size: var(--fs-body);
  color: var(--c-titan);
  line-height: 1.6;
}

/* ===== 手风琴条目 ===== */
.page-faq .qa-item {
  position: relative;
  background: var(--c-white);
  border: 2px solid var(--c-deep-blue);
  border-radius: var(--radius-none);
  box-shadow: 0 4px 0 rgba(10, 27, 61, 0.12);
  margin-bottom: 1.25rem;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.page-faq .qa-item:hover {
  box-shadow: 0 8px 24px rgba(10, 27, 61, 0.16);
  transform: translateY(-2px);
}

.page-faq .qa-item__q {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1.1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.page-faq .qa-item__num {
  font-family: var(--font-headline);
  font-size: 2rem;
  font-weight: 900;
  line-height: 1;
  color: var(--c-titan);
  min-width: 44px;
  text-align: right;
  transition: color 0.3s ease;
}

.page-faq .qa-item:hover .qa-item__num {
  color: var(--c-deep-blue);
}

.page-faq .qa-item__text {
  flex: 1;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-deep-blue);
}

.page-faq .qa-item__icon {
  position: relative;
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  background: var(--c-gold);
  border: 2px solid var(--c-deep-blue);
  border-radius: 50%;
  transition: transform 0.35s ease, background 0.35s ease;
}

.page-faq .qa-item__icon::before,
.page-faq .qa-item__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--c-deep-blue);
  transform: translate(-50%, -50%);
  transition: background 0.35s;
}

.page-faq .qa-item__icon::before {
  width: 12px;
  height: 2px;
}

.page-faq .qa-item__icon::after {
  width: 2px;
  height: 12px;
}

.page-faq .qa-item[open] .qa-item__icon {
  background: var(--c-deep-blue);
  transform: rotate(180deg);
}

.page-faq .qa-item[open] .qa-item__icon::before,
.page-faq .qa-item[open] .qa-item__icon::after {
  background: var(--c-gold);
}

.page-faq .qa-item__a {
  padding: 0 1.25rem 1.25rem;
}

.page-faq .qa-item[open] .qa-item__a {
  animation: page-faq-fade-slide 0.35s ease-out;
}

@keyframes page-faq-fade-slide {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .qa-item__a p {
  margin: 0 0 0.5rem;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--c-deep-blue);
}

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

.page-faq .qa-item__more,
.page-faq .qa-item__link {
  color: var(--c-orange);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s;
}

.page-faq .qa-item__more:hover,
.page-faq .qa-item__link:hover {
  border-color: currentColor;
}

/* ===== 费用周期示意图 ===== */
.page-faq .faq-section__media {
  margin: 0 0 1.75rem;
  background: var(--c-deep-blue);
}

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

/* ===== 联系区块 ===== */
.page-faq .faq-section--contact {
  background: var(--c-deep-blue);
  border: 2px solid var(--c-deep-blue);
  padding: 1.5rem;
  color: var(--c-white);
}

.page-faq .faq-section--contact .faq-section__head {
  border-left-color: var(--c-gold);
}

.page-faq .faq-section--contact .section-marker {
  color: var(--c-gold);
}

.page-faq .faq-section--contact .faq-section__head p {
  color: rgba(255, 255, 255, 0.65);
}

.page-faq .faq-section--contact .faq-section__head h2 {
  color: var(--c-white);
}

.page-faq .faq-contact {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.page-faq .faq-contact__item {
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid rgba(255, 255, 255, 0.18);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  border-radius: var(--radius-none);
}

.page-faq .faq-contact__label {
  font-family: var(--font-number);
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

.page-faq .faq-contact__value {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-white);
  text-decoration: none;
}

.page-faq .faq-contact__value:hover {
  color: var(--c-gold);
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.65);
}

.page-faq .faq-contact__btn {
  width: 100%;
  justify-content: center;
}

/* ===== 桌面端 ===== */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 3.25rem 0 4.5rem;
  }

  .page-faq .faq-body {
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 3.5rem;
    padding-top: 3rem;
    padding-bottom: 5rem;
  }

  .page-faq .faq-sidebar {
    position: sticky;
    top: calc(var(--nav-h) + 24px);
    padding: 1.5rem;
  }

  .page-faq .faq-sidebar__media img {
    height: auto;
  }

  .page-faq .faq-sidebar__nav {
    flex-direction: column;
    gap: 0.4rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-sidebar__link {
    width: 100%;
    white-space: normal;
    justify-content: flex-start;
  }

  .page-faq .faq-content {
    gap: 4.5rem;
  }

  .page-faq .faq-section__head {
    margin-bottom: 2.25rem;
  }

  .page-faq .qa-item__q {
    padding: 1.3rem 1.5rem;
  }

  .page-faq .qa-item__num {
    font-size: 2.4rem;
    min-width: 52px;
  }

  .page-faq .qa-item__a {
    padding: 0 1.5rem 1.5rem;
  }

  .page-faq .faq-section--contact {
    padding: 2.5rem;
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-contact__btn {
    width: auto;
    min-width: 260px;
  }
}