.page-faq {
  --faq-line-soft: 2px solid #C9D6EA;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-block: clamp(1.4rem, 5vw, 3.2rem) clamp(1.4rem, 4vw, 2.4rem);
}

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(1rem, 3vw, 1.8rem);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.1rem, 7vw, 4.1rem);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 0.55rem 0 1rem;
  max-width: 17ch;
  color: var(--deep-sea);
}

.page-faq .faq-hero .lede {
  max-width: 52ch;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.8;
  color: var(--ink);
  margin: 0;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

.page-faq .faq-hero__card {
  position: relative;
  background: var(--white);
  border: var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-mid);
  padding: clamp(1.1rem, 3vw, 1.6rem);
}

.page-faq .faq-hero__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  border-radius: var(--radius-card) 0 0 var(--radius-card);
  background: linear-gradient(180deg, var(--beibo-blue), var(--mint));
}

.page-faq .faq-hero__card-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-faq .faq-hero__card-num {
  margin: 0.5rem 0 0.6rem;
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 6vw, 2.9rem);
  line-height: 1;
  color: var(--beibo-blue);
}

.page-faq .faq-hero__card-num span {
  font-size: 0.95rem;
  margin-left: 0.35rem;
  color: var(--gray);
}

.page-faq .faq-hero__card-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--gray);
}

/* ---------- 数据条 ---------- */
.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.2rem;
  margin: clamp(1.6rem, 4vw, 2.4rem) 0 0;
  padding-top: clamp(1rem, 3vw, 1.4rem);
  border-top: var(--faq-line-soft);
}

.page-faq .faq-stats__item dt {
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--gray);
}

.page-faq .faq-stats__item dd {
  margin: 0.25rem 0 0;
  font-size: 0.88rem;
  color: var(--ink);
}

.page-faq .faq-stats__num {
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  color: var(--deep-sea);
  margin-right: 0.2rem;
}

/* ---------- 主体栅格 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(1.4rem, 4vw, 3rem);
  padding-block: clamp(2rem, 5vw, 3.6rem) clamp(2.6rem, 6vw, 5rem);
}

/* ---------- 侧栏索引 ---------- */
.page-faq .faq-rail {
  background: var(--haze);
  border: var(--faq-line-soft);
  border-radius: var(--radius-card);
  padding: 1rem 1rem 1.1rem;
}

.page-faq .faq-rail__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--deep-sea);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0.8rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.25rem;
}

.page-faq .faq-rail__list a {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.4rem 0.5rem;
  border-left: 2px solid #C9D6EA;
  color: var(--gray);
  text-decoration: none;
  font-size: 0.9rem;
  line-height: 1.5;
  transition: border-color 160ms ease, color 160ms ease, background-color 160ms ease;
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  border-left-color: var(--beibo-blue);
  color: var(--deep-sea);
  background: var(--white);
}

.page-faq .faq-rail__list a:focus-visible {
  outline: 3px solid var(--warm-orange);
  outline-offset: 1px;
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--beibo-blue);
}

.page-faq .faq-rail__hint {
  margin: 0.9rem 0 0;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--gray);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--nav-h) + 1.6rem);
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(2.2rem, 5vw, 3.4rem);
  padding-top: clamp(2.2rem, 5vw, 3.4rem);
  border-top: var(--faq-line-soft);
}

.page-faq .faq-section__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.6vw, 2.2rem);
  line-height: 1.25;
  letter-spacing: -0.005em;
  margin: 0.5rem 0 0.7rem;
  color: var(--deep-sea);
}

.page-faq .faq-section__text {
  margin: 0 0 1.2rem;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 三步走 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-faq .step {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  align-items: flex-start;
  background: var(--white);
  border: var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-mid);
  padding: 1.2rem 1.1rem 1.25rem;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.page-faq .step:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hard);
}

.page-faq .step--final {
  background: var(--mint-soft);
}

.page-faq .step__num {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  line-height: 1;
  color: var(--warm-orange);
}

.page-faq .step--final .step__num {
  color: var(--deep-orange);
}

.page-faq .step__title {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ink);
}

.page-faq .step__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .step .tag {
  margin-top: auto;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: clamp(1.4rem, 4vw, 2rem) 0 0;
  border: var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-mid);
  overflow: hidden;
  background: var(--white);
}

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

.page-faq .faq-figure .media__caption {
  padding: 0.65rem 0.9rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--gray);
  border-top: var(--faq-line-soft);
  background: var(--white);
}

.page-faq .faq-figure--side {
  margin-top: 1.2rem;
}

/* ---------- 检查清单 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 1.2rem;
}

.page-faq .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-faq .checklist__item {
  position: relative;
  background: var(--white);
  border: var(--faq-line-soft);
  border-radius: var(--radius-note);
  padding: 0.9rem 1rem;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.page-faq .checklist__item:focus-within {
  border-color: var(--beibo-blue);
  box-shadow: var(--shadow-soft);
}

.page-faq .checklist__box {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-faq .checklist__label {
  position: relative;
  display: block;
  padding-left: 2.35rem;
  cursor: pointer;
}

.page-faq .checklist__label::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.05rem;
  width: 1.4rem;
  height: 1.4rem;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--white);
  transition: background-color 160ms ease, border-color 160ms ease;
}

.page-faq .checklist__label::after {
  content: "";
  position: absolute;
  left: 0.5rem;
  top: 0.33rem;
  width: 0.4rem;
  height: 0.75rem;
  border-right: 3px solid var(--deep-sea);
  border-bottom: 3px solid var(--deep-sea);
  transform: rotate(45deg) scale(0);
  transform-origin: center;
  transition: transform 160ms ease;
}

.page-faq .checklist__box:checked + .checklist__label::before {
  background: var(--mint);
  border-color: var(--deep-sea);
}

.page-faq .checklist__box:checked + .checklist__label::after {
  transform: rotate(45deg) scale(1);
}

.page-faq .checklist__box:focus-visible + .checklist__label::before {
  outline: 3px solid var(--warm-orange);
  outline-offset: 2px;
}

.page-faq .checklist__title {
  display: block;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--ink);
  margin-bottom: 0.2rem;
}

.page-faq .checklist__text {
  display: block;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--gray);
}

/* ---------- 高频问答 ---------- */
.page-faq .qa-group {
  margin-top: 1.4rem;
}

.page-faq .qa-group:first-of-type {
  margin-top: 0.6rem;
}

.page-faq .qa-group__title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 0.5rem;
  font-size: 0.98rem;
  font-weight: 500;
  color: var(--deep-sea);
}

.page-faq .qa {
  background: var(--white);
  border: var(--faq-line-soft);
  border-radius: var(--radius-note);
  padding: 0.1rem 0.95rem;
  margin-top: 0.5rem;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.page-faq .qa[open] {
  border-color: var(--beibo-blue);
  box-shadow: var(--shadow-soft);
}

.page-faq .qa summary {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 0.8rem 1.9rem 0.8rem 0;
  font-size: 0.98rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .qa summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--beibo-blue);
}

.page-faq .qa[open] summary::after {
  content: "−";
  color: var(--warm-orange);
}

.page-faq .qa summary:focus-visible {
  outline: 3px solid var(--warm-orange);
  outline-offset: 2px;
  border-radius: 4px;
}

.page-faq .qa__body {
  padding: 0 0 0.9rem;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--gray);
}

/* ---------- 场景 ---------- */
.page-faq .scenes {
  display: grid;
  gap: 0.9rem;
}

.page-faq .scene {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  background: var(--white);
  border: var(--line);
  border-radius: var(--radius-card);
  padding: 1.1rem 1rem 1.15rem;
  transition: border-color 200ms ease, box-shadow 200ms ease, transform 180ms ease;
}

.page-faq .scene:hover {
  border-color: var(--beibo-blue);
  box-shadow: var(--shadow-mid);
  transform: translateY(-2px);
}

.page-faq .scene__title {
  margin: 0.15rem 0 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--deep-sea);
}

.page-faq .scene__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-faq .scene .link-arrow {
  margin-top: auto;
  font-size: 0.9rem;
}

/* ---------- 术语 ---------- */
.page-faq .glossary {
  display: grid;
  gap: 0.85rem;
  margin: 0;
}

.page-faq .glossary__item {
  background: var(--haze);
  border-left: 4px solid var(--beibo-blue);
  border-radius: 0 var(--radius-note) var(--radius-note) 0;
  padding: 0.9rem 1rem;
}

.page-faq .glossary__item dt {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--deep-sea);
  margin-bottom: 0.3rem;
}

.page-faq .glossary__item dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-faq .faq-next {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  margin-top: 1.4rem;
  padding: 1rem 1.1rem;
  border: var(--faq-line-soft);
  border-radius: var(--radius-card);
  background: var(--cream);
}

.page-faq .faq-next__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ink);
  max-width: 40ch;
}

/* ---------- 帮助面板 ---------- */
.page-faq .help-panel {
  display: grid;
  gap: 1.3rem;
  background: var(--deep-sea);
  color: var(--cream);
  border: var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-mid);
  padding: clamp(1.2rem, 4vw, 2rem);
}

.page-faq .help-panel__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 700;
  color: var(--white);
}

.page-faq .help-panel__text {
  margin: 0 0 0.8rem;
  font-size: 0.94rem;
  line-height: 1.8;
  color: #D7E2F5;
  max-width: 46ch;
}

.page-faq .help-panel__body .btn {
  margin-top: 0.4rem;
}

.page-faq .help-panel__contacts {
  display: grid;
  gap: 0.7rem;
  align-content: start;
}

.page-faq .help-contact {
  background: rgba(255, 255, 255, 0.08);
  border: 2px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-note);
  padding: 0.75rem 0.9rem;
}

.page-faq .help-contact__k {
  margin: 0 0 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: #A9C0E6;
}

.page-faq .help-contact__v {
  margin: 0;
  display: inline-block;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--white);
  text-decoration: none;
  word-break: break-all;
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
  transition: color 160ms ease, border-color 160ms ease;
}

.page-faq .help-contact a.help-contact__v:hover,
.page-faq .help-contact a.help-contact__v:focus-visible {
  color: #A9F0DC;
  border-color: #A9F0DC;
}

.page-faq .help-contact a.help-contact__v:focus-visible {
  outline: 3px solid var(--warm-orange);
  outline-offset: 3px;
}

.page-faq .help-contact p.help-contact__v {
  border-bottom: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .glossary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-faq .faq-hero__card {
    max-width: 40rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .faq-figure--side {
    margin-top: 0;
  }

  .page-faq .help-panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 258px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--nav-h) + 1.5rem);
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    border-left: var(--faq-line-soft);
    padding-left: 1rem;
  }

  .page-faq .faq-rail__list a {
    border-left: none;
    padding-left: 0.35rem;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    background: var(--haze);
  }

  .page-faq .faq-main {
    min-width: 0;
  }
}

@media (min-width: 1080px) {
  .page-faq .scenes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .scene--wide {
    grid-column: span 2;
  }
}

@media (max-width: 959px) {
  .page-faq .faq-rail__list {
    grid-auto-flow: column;
    grid-auto-columns: max-content;
    overflow-x: auto;
    padding-bottom: 0.35rem;
  }

  .page-faq .faq-rail__list a {
    white-space: nowrap;
    border-left: none;
    border-bottom: 2px solid #C9D6EA;
    padding: 0.35rem 0.5rem;
  }

  .page-faq .faq-rail__list a:hover,
  .page-faq .faq-rail__list a:focus-visible {
    border-bottom-color: var(--beibo-blue);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step,
  .page-faq .scene,
  .page-faq .qa,
  .page-faq .checklist__item,
  .page-faq .checklist__label::before,
  .page-faq .checklist__label::after,
  .page-faq .faq-rail__list a,
  .page-faq .help-contact__v {
    transition: color 160ms ease;
  }

  .page-faq .step:hover,
  .page-faq .scene:hover {
    transform: none;
  }
}
</main>