/* 页面专属 CSS：page-faq 常见问题 */
.page-faq {
  --faq-sky: var(--color-sky);
  --faq-night: var(--color-night);
  --faq-lake: var(--color-lake);
  --faq-mist: var(--color-mist);
  --faq-gold: var(--color-gold);
  --faq-frost: var(--color-frost);
  --faq-slate: var(--color-slate);
  background: #FBFCFE;
}

/* ===== 页首封面 ===== */
.page-faq__hero {
  background: linear-gradient(135deg, #0A2E4A 0%, #1B5E8C 78%, #3A7CB8 100%);
  color: #FFFFFF;
  border-bottom: 3px solid var(--faq-gold);
  position: relative;
}

.page-faq__hero::after {
  content: "";
  display: block;
  height: 6px;
  background: repeating-linear-gradient(
    to right,
    var(--faq-gold) 0,
    var(--faq-gold) 60px,
    rgba(255, 255, 255, 0.35) 60px,
    rgba(255, 255, 255, 0.35) 72px
  );
}

.page-faq__hero .breadcrumb {
  margin-bottom: 2.25rem;
}

.page-faq__hero .breadcrumb__link,
.page-faq__hero .breadcrumb__current {
  color: rgba(255, 255, 255, 0.88);
}

.page-faq__hero .breadcrumb__current {
  color: #FFFFFF;
  border-bottom: 1px solid var(--faq-gold);
}

.page-faq__hero-grid {
  display: block;
  padding-bottom: 2rem;
}

.page-faq__kicker {
  font-family: var(--font-aux);
  font-size: 0.8125rem;
  letter-spacing: 0.24em;
  color: var(--faq-gold);
  margin: 0 0 0.75rem;
  text-transform: uppercase;
}

.page-faq__title {
  font-size: clamp(1.75rem, 4.6vw, 2.75rem);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: 0.01em;
  margin: 0 0 1.125rem;
  max-width: 12em;
}

.page-faq__lead {
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.9);
  max-width: 42em;
  margin: 0;
}

.page-faq__hero-side {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 1rem;
  margin-top: 1.75rem;
}

.page-faq__stat {
  background: rgba(255, 255, 255, 0.08);
  border-left: 2px solid var(--faq-gold);
  padding: 0.75rem 1rem 0.875rem;
  min-width: 118px;
}

.page-faq__stat-num {
  display: block;
  font-family: var(--font-aux);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--faq-gold);
  line-height: 1.1;
}

.page-faq__stat-label {
  display: block;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.72);
  margin-top: 0.375rem;
}

.page-faq__vertical {
  display: none;
  writing-mode: vertical-rl;
  font-family: var(--font-aux);
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  color: rgba(255, 255, 255, 0.5);
  border-left: 1px solid rgba(255, 255, 255, 0.24);
  padding-left: 0.875rem;
  height: 88px;
  margin-left: auto;
  white-space: nowrap;
}

/* ===== 主体布局 ===== */
.page-faq__body {
  padding: 2.25rem 0 4.5rem;
}

.page-faq__layout {
  display: block;
}

/* ===== 左侧问题索引 ===== */
.page-faq__index {
  background: #FFFFFF;
  border: 1px solid #E1EAF3;
  box-shadow: 0 4px 16px rgba(10, 46, 74, 0.06);
  padding: 1.25rem;
  margin-bottom: 2rem;
}

.page-faq__index-title {
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--faq-night);
  margin: 0 0 0.875rem;
  padding-bottom: 0.625rem;
  border-bottom: 2px solid var(--faq-gold);
}

.page-faq__index-list {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
}

.page-faq__index-list li {
  margin-bottom: 0.25rem;
}

.page-faq__index-list a {
  display: flex;
  align-items: baseline;
  gap: 0.625rem;
  padding: 0.5rem 0.625rem;
  color: var(--faq-sky);
  text-decoration: none;
  font-size: 0.9375rem;
  border-left: 2px solid transparent;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.page-faq__index-list a:hover,
.page-faq__index-list a:focus-visible {
  border-left-color: var(--faq-gold);
  background: var(--faq-mist);
  color: var(--faq-night);
}

.page-faq__index-num {
  font-family: var(--font-aux);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--faq-gold);
  flex-shrink: 0;
  min-width: 1.75em;
}

.page-faq__index-cta {
  border-top: 1px dashed var(--faq-frost);
  padding-top: 0.875rem;
}

.page-faq__index-cta p {
  font-size: 0.8125rem;
  color: var(--faq-slate);
  margin: 0 0 0.375rem;
}

.page-faq__index-cta a {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--faq-sky);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-gold);
  padding-bottom: 1px;
}

.page-faq__index-cta a:hover,
.page-faq__index-cta a:focus-visible {
  color: var(--faq-night);
}

/* ===== 右侧内容区 ===== */
.page-faq__content {
  min-width: 0;
}

.page-faq__section {
  margin-bottom: 3.5rem;
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.page-faq__section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 2px solid var(--faq-gold);
  padding-bottom: 0.625rem;
  margin-bottom: 1.75rem;
}

.page-faq__section-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--faq-night);
}

.page-faq__section-kicker {
  font-family: var(--font-aux);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--faq-gold);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.page-faq__section:target .page-faq__section-head {
  border-bottom-color: var(--faq-night);
  border-bottom-width: 3px;
}

.page-faq__section:target .page-faq__section-kicker {
  color: var(--faq-lake);
}

/* ===== QA 网格 ===== */
.page-faq__qa-layout {
  display: block;
}

.page-faq__qa-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

/* ===== 单条问答 ===== */
.page-faq__item {
  background: #FFFFFF;
  border: 1px solid #E3ECF5;
  border-left: 3px solid var(--faq-frost);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq__item[open] {
  border-left-color: var(--faq-sky);
  box-shadow: 0 4px 16px rgba(10, 46, 74, 0.08);
}

.page-faq__item summary {
  display: flex;
  align-items: flex-start;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

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

.page-faq__item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-aux);
  font-size: 1.375rem;
  font-weight: 400;
  color: var(--faq-gold);
  line-height: 1;
  padding-left: 1rem;
  flex-shrink: 0;
}

.page-faq__item[open] summary::after {
  content: "−";
}

.page-faq__item summary:hover,
.page-faq__item summary:focus-visible {
  background: rgba(230, 240, 250, 0.5);
}

.page-faq__item summary:focus-visible {
  outline: 2px solid var(--faq-lake);
  outline-offset: -2px;
}

.page-faq__q-num {
  font-family: var(--font-aux);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--faq-gold);
  background: #FDF7EA;
  border: 1px solid #F0E3C0;
  border-radius: 50%;
  width: 1.875rem;
  height: 1.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.125rem;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq__item summary:hover .page-faq__q-num,
.page-faq__item[open] summary .page-faq__q-num {
  background: var(--faq-gold);
  border-color: var(--faq-gold);
  color: #FFFFFF;
}

.page-faq__q-text {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--faq-night);
  line-height: 1.5;
  flex: 1;
}

/* ===== 答案区 ===== */
.page-faq__a {
  padding: 0.875rem 1.25rem 1.25rem calc(3.375rem);
  border-top: 1px dashed var(--faq-frost);
  background: linear-gradient(90deg, rgba(230, 240, 250, 0.7), rgba(255, 255, 255, 0) 85%);
}

.page-faq__a p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--faq-slate);
}

.page-faq__a a {
  color: var(--faq-sky);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--faq-frost);
}

.page-faq__a a:hover,
.page-faq__a a:focus-visible {
  color: var(--faq-night);
  text-decoration-color: var(--faq-gold);
}

/* ===== 图片与步骤 ===== */
.page-faq__figure {
  margin: 1.75rem 0 0;
}

.page-faq__media-frame {
  position: relative;
  overflow: hidden;
  background: var(--faq-mist);
  border: 1px solid var(--faq-frost);
}

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

.page-faq__steps {
  list-style: none;
  margin: 0.875rem 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.page-faq__steps li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--faq-slate);
  line-height: 1.6;
}

.page-faq__steps span {
  font-family: var(--font-aux);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--faq-gold);
  min-width: 1.75em;
}

.page-faq__figure figcaption {
  font-size: 0.8125rem;
  color: var(--faq-slate);
  margin-top: 0.625rem;
  line-height: 1.6;
  border-left: 2px solid var(--faq-gold);
  padding-left: 0.625rem;
}

.page-faq__figure--feedback {
  margin-top: 1.75rem;
}

.page-faq__media-frame--square {
  max-width: 220px;
}

/* ===== 桌面端 ===== */
@media (min-width: 768px) {
  .page-faq__hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 2.5rem;
    align-items: end;
    padding-bottom: 2.5rem;
  }

  .page-faq__hero-side {
    margin-top: 0;
    justify-content: flex-end;
  }

  .page-faq__vertical {
    display: block;
  }

  .page-faq__body {
    padding: 3.5rem 0 5rem;
  }

  .page-faq__layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 2.5rem;
    align-items: start;
  }

  .page-faq__index {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
    margin-bottom: 0;
  }

  .page-faq__qa-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 1.75rem;
    align-items: start;
  }

  .page-faq__figure {
    margin-top: 0;
  }

  .page-faq__figure--feedback {
    margin-top: 0;
  }
}

@media (min-width: 1024px) {
  .page-faq__layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 3rem;
  }

  .page-faq__section-title {
    font-size: 1.625rem;
  }
}