.page-faq {
  background: var(--paper);
  color: var(--gray-700);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 22px 0 34px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 26px;
}

.page-faq .faq-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 5.4vw, 2.75rem);
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-hero .lede {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: var(--t-16);
  line-height: 1.75;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 版本速览板 ---------- */
.page-faq .faq-board {
  position: relative;
  padding: 18px 18px 16px;
  border-radius: var(--r-lg);
  background: var(--blue-900);
  color: #E7EFF7;
  overflow: hidden;
}

.page-faq .faq-board::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.055) 0 1px,
    transparent 1px 28px
  );
  pointer-events: none;
}

.page-faq .faq-board > * {
  position: relative;
}

.page-faq .faq-board__bar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.page-faq .faq-board__ver {
  font-size: var(--t-20);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #fff;
}

.page-faq .faq-board__date {
  font-size: var(--t-12);
  letter-spacing: 0.02em;
  color: #9FC0E0;
}

.page-faq .faq-board__list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
}

.page-faq .faq-board__item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  font-size: var(--t-14);
  line-height: 1.5;
  color: #E7EFF7;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.14);
}

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

.page-faq .faq-board__idx {
  font-size: var(--t-12);
  letter-spacing: 0.08em;
  color: var(--brass-100);
}

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

.page-faq .faq-board__foot {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

/* ---------- 分类导航 ---------- */
.page-faq .faq-catsec {
  padding-top: 34px;
}

.page-faq .faq-sec-intro {
  margin: 10px 0 0;
  max-width: 44em;
  font-size: var(--t-16);
  line-height: 1.75;
}

.page-faq .faq-cats {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-cat {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 15px 16px 17px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue-700);
  border-radius: var(--r-md);
  background: #fff;
  color: inherit;
  text-decoration: none;
  transition: border-color var(--fast), transform var(--fast),
    background-color var(--fast);
}

.page-faq .faq-cat:nth-child(2) {
  border-top-color: var(--celadon-600);
}

.page-faq .faq-cat:nth-child(3) {
  border-top-color: var(--blue-500);
}

.page-faq .faq-cat:nth-child(4) {
  border-top-color: var(--brass-600);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  border-color: var(--blue-500);
  background: var(--gray-50);
  transform: translateX(2px);
}

.page-faq .faq-cat__num {
  font-size: var(--t-12);
  letter-spacing: 0.12em;
  color: var(--brass-600);
}

.page-faq .faq-cat__name {
  font-family: var(--font-display);
  font-size: var(--t-20);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
}

.page-faq .faq-cat__desc {
  font-size: var(--t-14);
  line-height: 1.65;
  color: var(--gray-700);
}

.page-faq .faq-cat__flag {
  margin-top: 4px;
}

/* ---------- 路径图 ---------- */
.page-faq .faq-map {
  margin: 22px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--gray-50);
  overflow: hidden;
}

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

.page-faq .faq-map figcaption,
.page-faq .faq-device figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-size: var(--t-12);
  letter-spacing: 0.02em;
  color: var(--gray-700);
}

/* ---------- 双轴主体 ---------- */
.page-faq .faq-body {
  padding-top: 34px;
  padding-bottom: 48px;
}

.page-faq .faq-layout {
  display: grid;
  gap: 26px;
}

.page-faq .faq-rail {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--gray-50);
  padding: 14px 14px 16px;
}

.page-faq .faq-rail .rail__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.12em;
  color: var(--brass-600);
  text-transform: uppercase;
}

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

.page-faq .faq-rail .rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border-left: 2px solid var(--line-strong);
  font-size: var(--t-14);
  line-height: 1.5;
  color: var(--gray-700);
  text-decoration: none;
  transition: border-color var(--fast), color var(--fast),
    background-color var(--fast);
}

.page-faq .faq-rail .rail__link:hover,
.page-faq .faq-rail .rail__link:focus-visible {
  border-left-color: var(--blue-500);
  background: #fff;
  color: var(--blue-700);
}

.page-faq .faq-rail .rail__link[aria-current] {
  border-left-color: var(--blue-700);
  background: var(--blue-100);
  color: var(--blue-900);
}

.page-faq .faq-rail .rail__num {
  font-size: var(--t-12);
  color: var(--brass-600);
  letter-spacing: 0.08em;
}

/* ---------- 问题区块 ---------- */
.page-faq .faq-block {
  padding-top: 26px;
  margin-top: 32px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-faq .faq-blocks > .faq-block:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.page-faq .faq-block__head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-block__num {
  flex: 0 0 auto;
  padding: 2px 7px;
  border: 1px solid var(--line-brass);
  border-radius: var(--r-sm);
  background: var(--brass-100);
  font-size: var(--t-12);
  letter-spacing: 0.1em;
  color: var(--brass-ink);
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--t-24);
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-block__intro {
  margin: 12px 0 0;
  font-size: var(--t-16);
  line-height: 1.75;
}

.page-faq .faq-block__intro a {
  color: var(--blue-700);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
}

.page-faq .faq-block__intro a:hover {
  text-decoration-color: var(--blue-500);
}

/* ---------- 编号步骤 ---------- */
.page-faq .step-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .step {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding: 13px 15px 14px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--blue-100);
  border-radius: var(--r-md);
  background: var(--paper);
  transition: border-color var(--fast), transform var(--fast),
    background-color var(--fast);
}

.page-faq .step:hover {
  border-left-color: var(--blue-500);
  background: #fff;
  transform: translateX(2px);
}

.page-faq .step__num {
  font-size: var(--t-20);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.04em;
  color: var(--brass-600);
}

.page-faq .step__title {
  margin: 0;
  font-size: var(--t-16);
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .step__text {
  margin: 5px 0 0;
  font-size: var(--t-14);
  line-height: 1.75;
  color: var(--gray-700);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-fold {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
  overflow: hidden;
}

.page-faq .faq-fold__summary {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 15px;
  cursor: pointer;
  list-style: none;
  font-size: var(--t-14);
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
}

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

.page-faq .faq-fold__summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 10px;
  font-family: var(--font-mono);
  font-size: var(--t-16);
  line-height: 1.4;
  color: var(--blue-500);
}

.page-faq .faq-fold[open] .faq-fold__summary::after {
  content: "–";
}

.page-faq .faq-fold__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--gray-200);
  transition: background-color var(--base);
}

.page-faq .faq-fold:hover .faq-fold__dot {
  background: var(--line-strong);
}

.page-faq .faq-fold[open] .faq-fold__dot {
  background: var(--blue-500);
}

.page-faq .faq-fold .fold__body {
  padding: 0 15px 15px 33px;
  font-size: var(--t-14);
  line-height: 1.75;
  color: var(--gray-700);
}

.page-faq .faq-fold .fold__body p {
  margin: 0;
}

.page-faq .faq-fold .fold__body a {
  color: var(--blue-700);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
}

.page-faq .faq-fold .fold__body a:hover {
  text-decoration-color: var(--blue-500);
}

/* ---------- 设备信息栏配图 ---------- */
.page-faq .faq-device {
  margin: 20px 0 0;
  border: 1px solid var(--line-blue);
  border-radius: var(--r-lg);
  background: var(--gray-50);
  overflow: hidden;
}

/* ---------- 反馈清单 ---------- */
.page-faq .faq-checklist {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-check {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 11px;
  align-items: start;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--celadon-200);
}

.page-faq .faq-check__mark {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  border-radius: var(--r-sm);
  background: var(--celadon-600);
}

.page-faq .faq-check__mark::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 2px;
  width: 4px;
  height: 8px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.page-faq .faq-check__text {
  font-size: var(--t-14);
  line-height: 1.75;
  color: var(--gray-700);
}

.page-faq .faq-check__text strong {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 收尾联系 ---------- */
.page-faq .faq-block--last {
  padding-bottom: 4px;
}

.page-faq .faq-reach {
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line-blue);
  border-radius: var(--r-lg);
  background: var(--blue-100);
}

.page-faq .faq-reach__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-faq .faq-reach__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(22, 67, 110, 0.16);
  font-size: var(--t-14);
  line-height: 1.6;
  color: var(--gray-700);
  overflow-wrap: anywhere;
}

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

.page-faq .faq-reach__label {
  font-size: var(--t-12);
  letter-spacing: 0.1em;
  color: var(--blue-700);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-step-pair {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 34px 0 46px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1fr) 350px;
    gap: 48px;
    align-items: center;
  }

  .page-faq .faq-layout {
    grid-template-columns: 232px minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-faq .faq-body {
    padding-top: 46px;
    padding-bottom: 64px;
  }

  .page-faq .faq-block {
    padding-top: 34px;
    margin-top: 42px;
  }

  .page-faq .faq-block__title {
    font-size: var(--t-32);
  }

  .page-faq .faq-catsec {
    padding-top: 46px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .step,
  .page-faq .faq-fold__dot,
  .page-faq .faq-rail .rail__link {
    transition: none;
  }

  .page-faq .faq-cat:hover,
  .page-faq .faq-cat:focus-visible,
  .page-faq .step:hover {
    transform: none;
  }
}