/* ===== 问题解答页面 · page-faq ===== */
.page-faq {
  --faq-radius: 14px;
  --faq-num-size: 2rem;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding-top: 1.5rem;
  padding-bottom: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.page-faq .breadcrumb a {
  color: var(--color-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--color-deepblue);
}

.page-faq .breadcrumb__sep {
  color: var(--color-border);
}

/* Hero */
.page-faq__hero {
  position: relative;
  display: grid;
  gap: 2rem;
  padding-top: 1rem;
  padding-bottom: 2.5rem;
  align-items: center;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.5rem;
  height: 4px;
  background: linear-gradient(90deg, var(--color-deepblue) 0 72%, var(--color-neon) 72% 100%);
  opacity: 0.9;
}

.page-faq__hero-copy {
  max-width: 660px;
}

.page-faq .section-kicker {
  display: inline-flex;
  align-items: center;
  margin: 0 0 0.75rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--color-neon);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-deepblue);
}

.page-faq h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 5vw, 3.25rem);
  line-height: 1.18;
  color: var(--color-deepblue);
}

.page-faq__lead {
  margin: 0 0 1.25rem;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-muted);
  max-width: 58ch;
}

/* 查找提示条 */
.page-faq__find-bar {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.875rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 1.25rem;
  box-shadow: 0 2px 8px rgba(11, 30, 59, 0.04);
}

.page-faq__find-bar svg {
  width: 1rem;
  height: 1rem;
  color: var(--color-deepblue);
}

.page-faq kbd {
  display: inline-block;
  min-width: 1.5rem;
  padding: 0.125rem 0.4rem;
  background: #ece6da;
  border: 1px solid var(--color-border);
  border-bottom-width: 2px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--color-ink);
  text-align: center;
}

.page-faq__key-plus {
  color: var(--color-muted);
}

.page-faq__key-sep {
  margin: 0 0.125rem;
  color: var(--color-border);
}

/* 按钮组 */
.page-faq__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* 图片容器 */
.page-faq__hero-media,
.page-faq__guide-media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--faq-radius);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  box-shadow: 0 8px 24px rgba(11, 30, 59, 0.06);
}

.page-faq__hero-media img,
.page-faq__guide-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

/* 主体布局 */
.page-faq__layout {
  display: grid;
  gap: 2.5rem;
  padding-bottom: 3rem;
}

.page-faq__main {
  min-width: 0;
}

.page-faq__side {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

/* 分组 */
.page-faq__group {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
}

.page-faq__group:first-child {
  border-top: 0;
  padding-top: 0.5rem;
}

.page-faq__group .section__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.125rem);
  line-height: 1.25;
  color: var(--color-deepblue);
}

.page-faq__group .section__lead {
  margin: 0 0 1.5rem;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 54ch;
}

/* 手风琴 */
.page-faq__items {
  display: grid;
  gap: 0.75rem;
}

.page-faq__item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--faq-radius);
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.page-faq__item:hover {
  border-color: #b6c0d1;
  box-shadow: 0 4px 16px rgba(11, 30, 59, 0.08);
}

.page-faq__item[open] {
  border-color: var(--color-deepblue-2);
  box-shadow: 0 10px 28px rgba(11, 30, 59, 0.1);
  transform: translateY(-1px);
}

.page-faq__item summary {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 1rem 1.25rem;
  list-style: none;
  cursor: pointer;
  font-weight: 600;
  color: var(--color-deepblue);
  transition: background 0.2s ease;
}

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

.page-faq__item summary:hover {
  background: rgba(11, 30, 59, 0.025);
}

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

.page-faq__num {
  flex: 0 0 var(--faq-num-size);
  width: var(--faq-num-size);
  height: var(--faq-num-size);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  background: var(--color-deepblue);
  color: var(--color-neon);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  transition: background 0.25s ease, color 0.25s ease;
}

.page-faq__item[open] .page-faq__num {
  background: var(--color-neon);
  color: var(--color-deepblue);
}

.page-faq__q {
  flex: 1 1 auto;
  font-size: 0.96875rem;
  line-height: 1.55;
}

.page-faq__item summary::after {
  content: "";
  flex: 0 0 0.5rem;
  width: 0.5rem;
  height: 0.5rem;
  border-right: 2px solid var(--color-muted);
  border-bottom: 2px solid var(--color-muted);
  transform: rotate(45deg);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-faq__item[open] summary::after {
  transform: rotate(-135deg);
  border-color: var(--color-deepblue);
}

.page-faq__answer {
  margin: 0 1.25rem 1.25rem;
  padding: 0.875rem 0 0;
  border-top: 1px dashed var(--color-border);
  color: var(--color-ink);
  font-size: 0.9375rem;
  line-height: 1.85;
}

.page-faq__answer p {
  margin: 0 0 0.625rem;
}

.page-faq__answer p:last-child {
  margin-bottom: 0;
}

.page-faq__hl {
  font-style: normal;
  font-weight: 600;
  color: var(--color-deepblue);
  background: linear-gradient(transparent 65%, rgba(57, 255, 20, 0.3) 65%);
  padding: 0 0.05em;
}

.page-faq__inline-link {
  color: var(--color-deepblue);
  text-decoration: underline;
  text-decoration-color: var(--color-neon);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
  font-weight: 600;
  transition: color 0.2s ease;
}

.page-faq__inline-link:hover,
.page-faq__inline-link:focus-visible {
  color: var(--color-deepblue-2);
  text-decoration-color: var(--color-deepblue);
}

/* 侧边卡片 */
.page-faq__side-card {
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--faq-radius);
  box-shadow: 0 4px 16px rgba(11, 30, 59, 0.05);
}

.page-faq__side-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--color-deepblue);
}

.page-faq__side-text {
  margin: 0 0 0.875rem;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-faq__side-label {
  margin: 0 0 0.625rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.page-faq__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq__tag {
  display: inline-block;
  padding: 0.375rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-paper);
  color: var(--color-deepblue);
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq__tag:hover,
.page-faq__tag:focus-visible {
  background: var(--color-card);
  border-color: var(--color-deepblue);
  box-shadow: 0 0 0 3px rgba(57, 255, 20, 0.25);
}

.page-faq__stats {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-faq__stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.page-faq__stat strong {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-orange);
  white-space: nowrap;
}

.page-faq__side-note {
  margin: 1rem 0 0;
  padding-top: 0.875rem;
  border-top: 1px dashed var(--color-border);
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-muted);
}

.page-faq__side-more {
  display: inline-block;
  margin-top: 0.875rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-deepblue);
  text-decoration: none;
  border-bottom: 2px solid var(--color-neon);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-bottom-color 0.2s ease;
}

.page-faq__side-more:hover,
.page-faq__side-more:focus-visible {
  color: var(--color-orange);
  border-bottom-color: var(--color-orange);
}

/* 深蓝操作路径区 */
.page-faq__guide-band {
  position: relative;
  background: var(--color-deepblue);
  color: #FFFFFF;
  padding: clamp(2.5rem, 7vw, 4.5rem) 0;
  margin-top: 1rem;
  overflow: hidden;
}

.page-faq__guide-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, transparent 0 72%, rgba(57, 255, 20, 0.14) 72% 100%),
    radial-gradient(circle at 88% 18%, rgba(57, 255, 20, 0.12), transparent 44%);
  pointer-events: none;
}

.page-faq__guide-inner {
  position: relative;
  display: grid;
  gap: 2.25rem;
  align-items: center;
}

.page-faq__guide-copy .section-kicker {
  color: var(--color-neon);
}

.page-faq__guide-copy .section__title {
  margin: 0 0 0.875rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.375rem);
  line-height: 1.25;
  color: #FFFFFF;
}

.page-faq__guide-lead {
  margin: 0 0 1.5rem;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.82);
  max-width: 56ch;
}

.page-faq__guide-link {
  color: var(--color-neon);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s ease;
}

.page-faq__guide-link:hover,
.page-faq__guide-link:focus-visible {
  color: #FFFFFF;
}

.page-faq__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  counter-reset: faq-step-counter;
}

.page-faq__steps li {
  counter-increment: faq-step-counter;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.page-faq__steps li::before {
  content: "0" counter(faq-step-counter);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 8px;
  background: rgba(57, 255, 20, 0.12);
  border: 1px solid rgba(57, 255, 20, 0.55);
  color: var(--color-neon);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
}

.page-faq__step-text {
  display: block;
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9375rem;
  line-height: 1.7;
  padding-top: 0.125rem;
}

.page-faq__step-text strong {
  display: block;
  color: #FFFFFF;
  font-weight: 700;
  margin-bottom: 0.125rem;
}

.page-faq__guide-media {
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
}

/* 联系 CTA */
.page-faq__contact {
  padding: 3rem 0 4rem;
}

.page-faq__contact-inner {
  display: grid;
  gap: 1.75rem;
  align-items: center;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--faq-radius);
  box-shadow: 0 6px 24px rgba(11, 30, 59, 0.05);
}

.page-faq__contact h2 {
  margin: 0 0 0.875rem;
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 3vw, 2rem);
  line-height: 1.3;
  color: var(--color-deepblue);
}

.page-faq__contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.625rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-ink);
}

.page-faq__contact-list li {
  padding-left: 1.25rem;
  position: relative;
}

.page-faq__contact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 0.5rem;
  height: 2px;
  background: var(--color-neon);
}

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

/* 桌面端 */
@media (min-width: 900px) {
  .page-faq__hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 3rem;
    padding-top: 1.5rem;
    padding-bottom: 3.5rem;
  }

  .page-faq__hero-copy {
    padding: 1.5rem 0;
  }

  .page-faq__layout {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 3rem;
    padding-bottom: 4rem;
  }

  .page-faq__group {
    padding: 2.5rem 0;
  }

  .page-faq__answer {
    margin-left: calc(1.25rem + var(--faq-num-size) + 0.875rem);
  }

  .page-faq__guide-inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: 3.5rem;
  }

  .page-faq__contact-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 2.5rem;
  }
}