.page-faq {
  --faq-rail: 116px;
  --faq-line: var(--line);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.75;
}

.page-faq a {
  color: var(--navy-600);
  text-decoration: none;
}

.page-faq a:hover,
.page-faq a:focus-visible {
  color: var(--signal);
  text-decoration: underline;
}

.page-faq h2,
.page-faq h3 {
  font-family: var(--font-serif);
  letter-spacing: -0.01em;
  color: var(--navy-900);
}

/* ---------- 面包屑 ---------- */
.page-faq .crumbs {
  padding-top: 18px;
  padding-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--slate);
}

.page-faq .crumbs__sep {
  margin: 0 8px;
  color: var(--line);
}

/* ---------- 首屏框景 ---------- */
.page-faq .faq-hero {
  padding: 12px 0 32px;
}

.page-faq .faq-hero__frame {
  position: relative;
  background: var(--white);
  border: 1px solid var(--faq-line);
  padding: 30px 18px 26px;
}

.page-faq .faq-hero__frame::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 8px;
  background-image: repeating-linear-gradient(to right, var(--navy-800) 0 1px, transparent 1px 12px);
  opacity: 0.4;
}

.page-faq .faq-corner {
  position: absolute;
  width: 12px;
  height: 12px;
  border: 2px solid var(--signal);
}

.page-faq .faq-corner--tl {
  top: -3px;
  left: -3px;
  border-right: 0;
  border-bottom: 0;
}

.page-faq .faq-corner--tr {
  top: -3px;
  right: -3px;
  border-left: 0;
  border-bottom: 0;
}

.page-faq .faq-corner--bl {
  bottom: -3px;
  left: -3px;
  border-right: 0;
  border-top: 0;
}

.page-faq .faq-corner--br {
  bottom: -3px;
  right: -3px;
  border-left: 0;
  border-top: 0;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 28px;
}

.page-faq .faq-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--navy-600);
  margin: 0 0 14px;
}

.page-faq .faq-hero h1 {
  font-size: clamp(28px, 7vw, 52px);
  line-height: 1.14;
  margin: 0 0 18px;
}

.page-faq .faq-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--mute);
  margin: 0;
  max-width: 62ch;
}

.page-faq .faq-lead--tight {
  margin-top: 20px;
  margin-bottom: 8px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-faq .faq-hero__actions .btn {
  flex: 1 1 auto;
  text-align: center;
  min-width: 168px;
}

.page-faq .faq-jump {
  border-top: 1px solid var(--faq-line);
  padding-top: 18px;
}

.page-faq .faq-jump__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--slate);
  margin: 0 0 12px;
}

.page-faq .faq-jump__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-jump__list li + li {
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-jump__list a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 0;
  color: var(--navy-800);
  font-size: 15px;
}

.page-faq .faq-jump__list a:hover,
.page-faq .faq-jump__list a:focus-visible {
  text-decoration: none;
  color: var(--signal);
}

.page-faq .faq-jump__no {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-dark);
}

/* ---------- 数据带 ---------- */
.page-faq .faq-band {
  background: var(--navy-900);
  border-top: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  color: var(--paper);
  padding: 22px 0;
}

.page-faq .faq-band__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 12px;
}

.page-faq .faq-band__item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 12px;
  border-left: 2px solid var(--cyan);
}

.page-faq .faq-band__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
}

.page-faq .faq-band__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--line);
}

/* ---------- 通用章节 ---------- */
.page-faq .faq-section {
  padding: 48px 0 8px;
}

.page-faq .faq-section--qa {
  padding-top: 56px;
}

/* ---------- 示意图 ---------- */
.page-faq .faq-figure {
  margin: 28px 0 0;
  border: 1px solid var(--faq-line);
  background: var(--sand);
}

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

.page-faq .faq-figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mute);
  padding: 10px 14px;
  border-top: 1px solid var(--faq-line);
  background: var(--paper);
}

/* ---------- 五步流程 ---------- */
.page-faq .step-layout {
  display: grid;
  gap: 20px;
  margin-top: 36px;
}

.page-faq .step-rail {
  display: none;
}

.page-faq .step-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 14px;
  border-left: 1px solid var(--faq-line);
}

.page-faq .step-rail__item {
  position: relative;
  margin-bottom: 22px;
}

.page-faq .step-rail__dot {
  position: absolute;
  left: -18px;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--line);
}

.page-faq .step-rail__item a {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.page-faq .step-rail__item a:hover .step-rail__dot,
.page-faq .step-rail__item a:focus-visible .step-rail__dot {
  background: var(--signal);
}

.page-faq .step-rail__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-faq .step-rail__name {
  font-size: 13px;
  color: var(--navy-800);
}

.page-faq .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: faq-step;
}

.page-faq .step-item {
  border-top: 1px solid var(--faq-line);
  padding: 22px 0 26px;
  display: grid;
  gap: 8px;
}

.page-faq .step-item:last-child {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .step-item__num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--navy-800);
  margin: 0;
  letter-spacing: -0.04em;
}

.page-faq .step-item__title {
  font-size: 19px;
  line-height: 1.4;
  margin: 0 0 8px;
}

.page-faq .step-item__body p {
  margin: 0 0 10px;
  color: var(--mute);
}

.page-faq .step-item__sub {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--navy-600);
  margin-top: 14px;
}

.page-faq .step-item__list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
}

.page-faq .step-item__list li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 5px;
  color: var(--ink);
}

.page-faq .step-item__list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cyan-dark);
}

.page-faq .step-item__out {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding-top: 4px;
  color: var(--navy-900);
  font-size: 14px;
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 22px 0 30px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-filter-count {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate);
  margin-left: auto;
}

/* ---------- 问答块 ---------- */
.page-faq .qa-block {
  border-top: 2px solid var(--navy-800);
  padding-top: 18px;
  margin-bottom: 44px;
}

.page-faq .qa-block__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
}

.page-faq .qa-block__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--signal);
  margin: 2px 0 0;
  letter-spacing: -0.04em;
}

.page-faq .qa-block__title {
  font-size: 21px;
  line-height: 1.35;
  margin: 0;
}

.page-faq .qa-block__note {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--slate);
  line-height: 1.6;
}

.page-faq .qa-block__grid {
  display: grid;
  gap: 20px;
}

.page-faq .faq-acc {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-acc:first-child {
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 14px;
  background: var(--sand);
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 15px;
  line-height: 1.6;
  color: var(--navy-900);
}

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

.page-faq .faq-q:hover {
  background: #EFDCB8;
}

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--navy-600);
  outline-offset: -2px;
}

.page-faq .faq-q__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--navy-600);
  padding-top: 4px;
  flex: 0 0 auto;
}

.page-faq .faq-q__text {
  flex: 1 1 auto;
}

.page-faq .faq-q__mark {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .faq-q__mark::before,
.page-faq .faq-q__mark::after {
  content: "";
  position: absolute;
  background: var(--navy-800);
}

.page-faq .faq-q__mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-q__mark::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
  transition: transform 0.2s var(--ease);
}

.page-faq .faq-acc[open] .faq-q__mark::after {
  transform: scaleY(0);
}

.page-faq .faq-a {
  background: var(--white);
  padding: 16px 14px 20px 40px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-faq .faq-a p {
  margin: 0;
}

.page-faq .faq-a ul {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}

.page-faq .faq-a li {
  position: relative;
  padding-left: 18px;
  margin-bottom: 5px;
}

.page-faq .faq-a li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--cyan-dark);
}

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

/* ---------- 联系区 ---------- */
.page-faq .faq-contact {
  margin-top: 56px;
  background: var(--navy-800);
  color: var(--paper);
  padding: 40px 0 32px;
  border-top: 2px solid var(--cyan);
}

.page-faq .faq-contact__grid {
  display: grid;
  gap: 24px;
}

.page-faq .faq-contact__title {
  font-size: 24px;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--white);
}

.page-faq .faq-contact__intro p {
  margin: 0;
  color: var(--line);
}

.page-faq .faq-contact__list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(201, 214, 223, 0.28);
}

.page-faq .faq-contact__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  min-width: 74px;
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-faq .faq-contact__actions .btn {
  flex: 1 1 auto;
  text-align: center;
  min-width: 160px;
}

.page-faq .faq-contact__note {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(201, 214, 223, 0.28);
  font-size: 13px;
  line-height: 1.7;
  color: var(--line);
}

/* ---------- 窄屏细节 ---------- */
@media (max-width: 560px) {
  .page-faq .faq-a {
    padding-left: 14px;
  }

  .page-faq .faq-contact__row dt {
    min-width: 100%;
  }
}

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

  .page-faq .step-item {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 24px;
    padding: 26px 0 30px;
  }

  .page-faq .step-item__num {
    font-size: 40px;
  }

  .page-faq .qa-block__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    align-items: start;
    gap: 28px;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-contact__actions {
    grid-column: 1 / -1;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq {
    font-size: 16px;
  }

  .page-faq .faq-hero {
    padding: 20px 0 40px;
  }

  .page-faq .faq-hero__frame {
    padding: 44px 40px 38px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.75fr) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-lead {
    font-size: 17px;
  }

  .page-faq .faq-section {
    padding-top: 64px;
  }

  .page-faq .step-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .step-rail {
    display: block;
    position: sticky;
    top: 72px;
  }

  .page-faq .qa-block {
    margin-bottom: 56px;
  }

  .page-faq .qa-block__title {
    font-size: 24px;
  }

  .page-faq .qa-block__num {
    font-size: 32px;
  }

  .page-faq .faq-q {
    padding: 16px 18px;
    font-size: 16px;
  }

  .page-faq .faq-a {
    padding: 18px 22px 24px 52px;
  }

  .page-faq .faq-contact {
    padding: 56px 0 40px;
  }

  .page-faq .faq-contact__title {
    font-size: 28px;
  }

  .page-faq .faq-contact__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 40px 56px;
  }
}