.page-faq {
  background-color: var(--void);
  color: var(--chalk);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: hidden;
}

.page-faq .container {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.page-faq .breadcrumb {
  padding-top: 22px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  border-bottom: 2px solid var(--steel);
  background-color: var(--void);
  background-image:
    repeating-linear-gradient(102deg, rgba(31, 107, 74, 0.13) 0 2px, rgba(31, 107, 74, 0) 2px 26px),
    linear-gradient(180deg, rgba(11, 24, 48, 0.9), rgba(5, 11, 24, 1));
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 30px;
  padding-block: clamp(30px, 7vw, 62px);
}

.page-faq .faq-hero__text {
  border-left: 4px solid var(--neon);
  padding-left: clamp(16px, 3vw, 28px);
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-size: clamp(30px, 7.2vw, 60px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--chalk);
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 17px;
  color: var(--haze);
}

.page-faq .faq-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--haze);
  font-family: var(--font-mono);
}

.page-faq .faq-hero__facts .mono,
.page-faq .faq-hero__facts span {
  color: var(--coral);
  font-size: 20px;
  font-weight: 700;
  margin-right: 6px;
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 2px solid var(--steel);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.45);
}

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

.page-faq .faq-hero__caption {
  padding: 10px 14px;
  background-color: var(--stand);
  border-top: 2px solid var(--steel);
  font-size: 13px;
  color: var(--haze);
}

/* ---------- 主体分栏 ---------- */
.page-faq .faq-board {
  display: grid;
  gap: 34px;
  padding-block: clamp(30px, 6vw, 60px) clamp(46px, 8vw, 88px);
}

.page-faq .faq-index {
  align-self: start;
  border: 2px solid var(--steel);
  background-color: var(--stand);
  padding: 20px 18px;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.4);
}

.page-faq .faq-index__head {
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--steel);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--neon);
  font-family: var(--font-mono);
}

.page-faq .faq-index__head .mono {
  color: var(--haze);
  margin-right: 8px;
}

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

.page-faq .faq-index__list li + li {
  margin-top: 4px;
}

.page-faq .faq-index__list a {
  display: block;
  padding: 9px 10px 9px 12px;
  border-left: 2px solid var(--steel);
  color: var(--chalk);
  text-decoration: none;
  font-size: 15px;
  transition: background-color 150ms var(--ease), border-color 150ms var(--ease);
}

.page-faq .faq-index__list a .mono {
  display: inline-block;
  min-width: 30px;
  color: var(--coral);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background-color: var(--void);
  border-left-color: var(--neon);
}

.page-faq .faq-index__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 2px solid var(--steel);
  font-size: 13px;
  color: var(--haze);
  line-height: 1.6;
}

/* ---------- 问答流 ---------- */
.page-faq .faq-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 5vw, 54px);
  min-width: 0;
}

.page-faq .faq-section {
  scroll-margin-top: calc(var(--rail-h) + var(--nav-h) + 18px);
}

.page-faq .faq-section__head {
  border-left: 4px solid var(--coral);
  padding-left: 16px;
  margin-bottom: 20px;
}

.page-faq .faq-section__head h2 {
  margin: 10px 0 0;
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--chalk);
}

.page-faq .faq-section__lede {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 16px;
  color: var(--haze);
}

.page-faq .faq-item {
  border-bottom: 2px solid var(--steel);
  background-color: rgba(11, 24, 48, 0.35);
}

.page-faq .faq-item:first-of-type {
  border-top: 2px solid var(--steel);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  transition: background-color 150ms var(--ease);
}

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

.page-faq .faq-item > summary:hover {
  background-color: var(--stand);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 4px;
}

.page-faq .faq-code {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--haze);
}

.page-faq .faq-q {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--chalk);
}

.page-faq .faq-sign {
  position: relative;
  width: 20px;
  height: 20px;
  flex: none;
  border: 2px solid var(--steel);
  transition: border-color 150ms var(--ease);
}

.page-faq .faq-sign::before,
.page-faq .faq-sign::after {
  content: "";
  position: absolute;
  background-color: var(--neon);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.page-faq .faq-sign::before {
  width: 10px;
  height: 2px;
}

.page-faq .faq-sign::after {
  width: 2px;
  height: 10px;
  transition: opacity 150ms var(--ease);
}

.page-faq .faq-item[open] > summary {
  background-color: var(--stand);
}

.page-faq .faq-item[open] > summary .faq-code {
  color: var(--neon);
}

.page-faq .faq-item[open] .faq-sign {
  border-color: var(--neon);
}

.page-faq .faq-item[open] .faq-sign::after {
  opacity: 0;
}

.page-faq .faq-a {
  margin: 0 16px 18px;
  padding: 14px 16px 16px;
  border-left: 2px solid var(--steel);
  background-color: var(--stand);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.35);
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 68ch;
  font-size: 16px;
  color: var(--haze);
}

.page-faq .faq-a p + p {
  margin-top: 12px;
}

.page-faq .faq-a__link {
  margin-top: 14px !important;
}

.page-faq .faq-a__link a {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 2px solid var(--neon-dim);
  font-weight: 700;
}

.page-faq .faq-a__link a:hover,
.page-faq .faq-a__link a:focus-visible {
  color: var(--coral);
  border-bottom-color: var(--coral);
}

/* ---------- 两步路径图 ---------- */
.page-faq .faq-diagram {
  margin: 0 0 20px;
  border: 2px solid var(--steel);
  background-color: var(--stand);
  padding: 18px;
}

.page-faq .faq-path {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-diagram__caption {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 2px solid var(--steel);
  font-size: 13px;
  color: var(--haze);
}

/* ---------- 设备与环境 ---------- */
.page-faq .faq-media {
  display: grid;
  gap: 22px;
  border: 2px solid var(--steel);
  background-color: var(--stand);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.4);
}

.page-faq .faq-media__figure {
  margin: 0;
  border: 2px solid var(--steel);
  background-color: var(--void);
}

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

.page-faq .faq-media__title {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: var(--chalk);
}

.page-faq .faq-media__body p {
  margin: 10px 0 0;
  font-size: 16px;
  color: var(--haze);
}

.page-faq .faq-media__list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-media__list li {
  padding: 8px 0 8px 12px;
  border-left: 2px solid var(--steel);
  font-size: 15px;
  color: var(--haze);
}

.page-faq .faq-media__list li + li {
  margin-top: 6px;
}

.page-faq .faq-media__list .mono {
  display: inline-block;
  min-width: 46px;
  color: var(--neon);
  font-size: 12px;
  letter-spacing: 0.1em;
}

/* ---------- 反馈材料 ---------- */
.page-faq .faq-submit {
  display: grid;
  gap: 20px;
}

.page-faq .faq-submit__checklist,
.page-faq .faq-submit__contact {
  border: 2px solid var(--steel);
  background-color: var(--stand);
  padding: 20px;
}

.page-faq .faq-submit__checklist {
  border-left: 4px solid var(--neon);
}

.page-faq .faq-submit__contact {
  border-left: 4px solid var(--coral);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.4);
}

.page-faq .faq-submit__title {
  margin: 0 0 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--steel);
  font-size: 17px;
  font-weight: 700;
  color: var(--chalk);
}

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

.page-faq .faq-check li + li {
  margin-top: 8px;
}

.page-faq .faq-check label {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 12px;
  align-items: start;
  padding: 9px 10px;
  border-left: 2px solid var(--steel);
  font-size: 15px;
  color: var(--haze);
  cursor: pointer;
  transition: background-color 150ms var(--ease), border-color 150ms var(--ease);
}

.page-faq .faq-check label:hover {
  background-color: var(--void);
  border-left-color: var(--neon);
}

.page-faq .faq-check input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 4px 0 0;
  accent-color: var(--neon);
  cursor: pointer;
}

.page-faq .faq-check input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: 3px;
}

.page-faq .faq-check input[type="checkbox"]:checked + span {
  color: var(--chalk);
  text-decoration: line-through;
  text-decoration-color: var(--neon-dim);
}

.page-faq .faq-contact {
  margin: 0;
  padding: 0;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 4px;
  padding: 10px 0;
  border-bottom: 2px solid var(--steel);
}

.page-faq .faq-contact__row:last-child {
  border-bottom: 0;
}

.page-faq .faq-contact__key {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--neon);
}

.page-faq .faq-contact__val {
  margin: 0;
  font-size: 16px;
  color: var(--chalk);
  word-break: break-word;
}

.page-faq .faq-submit__note {
  margin: 16px 0 0;
  font-size: 14px;
  color: var(--haze);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-outro {
  border: 2px solid var(--steel);
  border-top: 4px solid var(--neon);
  background-image: repeating-linear-gradient(102deg, rgba(31, 107, 74, 0.16) 0 2px, rgba(31, 107, 74, 0) 2px 24px);
  background-color: var(--stand);
  padding: clamp(22px, 4vw, 34px);
}

.page-faq .faq-outro__title {
  margin: 0;
  font-size: clamp(22px, 4vw, 30px);
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--chalk);
}

.page-faq .faq-outro__text {
  margin: 12px 0 0;
  max-width: 68ch;
  font-size: 16px;
  color: var(--haze);
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-media {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
    gap: 26px;
  }

  .page-faq .faq-submit {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 72px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
    gap: 44px;
  }

  .page-faq .faq-board {
    grid-template-columns: 258px minmax(0, 1fr);
    gap: 44px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--rail-h) + var(--nav-h) + 20px);
  }

  .page-faq .faq-item > summary {
    padding: 16px 20px;
    gap: 18px;
  }

  .page-faq .faq-a {
    margin: 0 20px 20px;
    padding: 16px 20px 18px;
  }
}