.page-faq {
  background: var(--paper);
  color: var(--slate);
  font-family: var(--font-body);
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

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

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 84% 6%, rgba(46, 230, 214, 0.16), transparent 58%),
    linear-gradient(158deg, var(--ink-abyss) 0%, var(--deep-sea) 100%);
  color: var(--paper);
  padding: 84px 0 46px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(185, 242, 237, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(185, 242, 237, 0.1) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(112% 118% at 14% 0%, #000 8%, transparent 74%);
  mask-image: radial-gradient(112% 118% at 14% 0%, #000 8%, transparent 74%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-faq .faq-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0 0 30px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(245, 248, 249, 0.6);
}

.page-faq .faq-crumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-crumb li + li::before {
  content: "/";
  color: var(--cyan);
}

.page-faq .faq-crumb a {
  color: rgba(245, 248, 249, 0.82);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

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

.page-faq .faq-crumb [aria-current="page"] {
  color: var(--paper);
}

.page-faq .faq-hero__eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan);
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

.page-faq .faq-hero__lede {
  max-width: 62ch;
  margin: 22px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(245, 248, 249, 0.82);
}

.page-faq .faq-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(185, 242, 237, 0.22);
  border-bottom: 1px solid rgba(185, 242, 237, 0.22);
}

.page-faq .faq-facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 15px 12px 15px 0;
  min-width: 0;
}

.page-faq .faq-facts li + li {
  padding-left: 14px;
  border-left: 1px solid rgba(185, 242, 237, 0.22);
}

.page-faq .faq-facts__num {
  font-family: var(--font-mono);
  font-size: 24px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-faq .faq-facts__label {
  font-size: 12px;
  line-height: 1.55;
  color: rgba(245, 248, 249, 0.68);
}

/* ---------- 主体 ---------- */

.page-faq .faq-board {
  padding: 32px 0 72px;
}

.page-faq .faq-board__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
}

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

.page-faq .faq-ruler__list {
  display: flex;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  overflow-x: auto;
  border-bottom: 1px solid var(--grid);
  scrollbar-width: none;
}

.page-faq .faq-ruler__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-ruler__item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px 10px 0;
  white-space: nowrap;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ocean-mid);
}

.page-faq .faq-ruler__mark {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--grid);
  stroke-width: 1.5;
}

.page-faq .faq-ruler__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.page-faq .faq-ruler__item.is-active {
  color: var(--deep-sea);
}

.page-faq .faq-ruler__item.is-active .faq-ruler__mark {
  fill: var(--coral);
  stroke: var(--coral);
}

.page-faq .faq-ruler__item.is-active .faq-ruler__num {
  color: var(--coral);
}

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

/* 分段切换 */

.page-faq .faq-tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-tab {
  -webkit-appearance: none;
  appearance: none;
  background: none;
  border: 0;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  min-height: 44px;
  padding: 10px 15px;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  color: var(--ocean-mid);
  cursor: pointer;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-tab:first-child {
  padding-left: 0;
}

.page-faq .faq-tab:hover {
  color: var(--deep-sea);
}

.page-faq .faq-tab[aria-selected="true"] {
  color: var(--deep-sea);
  border-bottom-color: var(--coral);
}

.page-faq .faq-tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* 面板 */

.page-faq .faq-panel {
  padding: 26px 0 0;
}

.page-faq .faq-panel:focus {
  outline: none;
}

.page-faq .faq-panel:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
}

.page-faq .faq-kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--coral);
}

.page-faq .faq-h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.6vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--deep-sea);
  text-wrap: balance;
}

.page-faq .faq-lead {
  margin: 0;
  max-width: 64ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-lead--tight {
  margin-top: 6px;
  font-size: 15px;
  color: var(--ocean-mid);
}

/* 图片 */

.page-faq .media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--grid);
  background: var(--sage);
}

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

.page-faq .media-frame--21x9 img {
  aspect-ratio: 21 / 9;
}

.page-faq .media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  margin: 0;
  padding: 6px 11px;
  background: var(--ink-abyss);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.page-faq .faq-figure {
  margin: 26px 0 6px;
}

/* 三步 */

.page-faq .faq-steps {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 6px 16px;
  padding: 24px 0;
  border-top: 1px solid var(--grid);
}

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

.page-faq .faq-step__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--deep-sea);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-faq .faq-step__title {
  margin: 6px 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--deep-sea);
}

.page-faq .faq-step__text p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

/* 小节标题 */

.page-faq .faq-h3 {
  margin: 42px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--deep-sea);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  line-height: 1.32;
  color: var(--deep-sea);
}

/* 折叠问答 */

.page-faq .faq-accordion {
  margin-top: 12px;
  border-top: 1px solid var(--grid);
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 56px;
  padding: 14px 0;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--deep-sea);
}

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-item__q::after {
  content: "›";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 22px;
  line-height: 1;
  color: var(--coral);
  transition: transform 180ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__q::after {
  transform: rotate(90deg);
}

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

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

/* 文字列表 */

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

.page-faq .faq-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 1px;
  background: var(--ocean-mid);
}

.page-faq .faq-list--check li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-left: 0;
}

.page-faq .faq-list--check li::before {
  display: none;
}

.page-faq .faq-list__key {
  flex: 0 0 auto;
  width: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--coral);
}

/* 两端差异 */

.page-faq .faq-split {
  display: grid;
  gap: 24px;
  margin-top: 24px;
  align-items: start;
}

.page-faq .faq-split p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--slate);
}

.page-faq .faq-split__figure {
  margin: 0;
}

/* 排查步骤 */

.page-faq .faq-checks {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--grid);
}

.page-faq .faq-checks li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--grid);
}

.page-faq .faq-checks__num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ocean-mid);
}

.page-faq .faq-checks strong {
  display: block;
  margin-bottom: 4px;
  font-size: 16px;
  line-height: 1.5;
  color: var(--deep-sea);
}

.page-faq .faq-checks p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* 参考值 */

.page-faq .faq-note {
  margin-top: 26px;
  padding: 18px 20px;
  background: var(--sage);
  border-left: 3px solid var(--deep-sea);
}

.page-faq .faq-note__label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--deep-sea);
}

.page-faq .faq-note p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--slate);
}

/* 联系前准备 */

.page-faq .faq-ready {
  margin-top: 24px;
  padding: 22px 20px;
  background: var(--coral-tint);
  border-left: 3px solid var(--coral);
}

.page-faq .faq-ready__title {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 700;
  color: var(--slate);
}

.page-faq .faq-ready .faq-list {
  margin-bottom: 0;
}

/* 联系方式 */

.page-faq .faq-contact {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-faq .faq-contact__cell {
  background: var(--paper);
  padding: 18px 16px;
  min-width: 0;
}

.page-faq .faq-contact__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ocean-mid);
}

.page-faq .faq-contact__value {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--deep-sea);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__value a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid var(--coral);
  padding-bottom: 1px;
}

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

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ocean-mid);
}

/* 更多链接 */

.page-faq .faq-more {
  margin: 28px 0 0;
}

.page-faq .faq-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font-size: 15px;
  font-weight: 700;
  color: var(--deep-sea);
  text-decoration: none;
  border-bottom: 2px solid var(--coral);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-link::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 14px;
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--coral);
}

.page-faq .faq-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 40px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 104px 0 56px;
  }

  .page-faq .faq-board {
    padding: 48px 0 88px;
  }

  .page-faq .faq-board__inner {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-ruler__list {
    position: sticky;
    top: 104px;
    flex-direction: column;
    margin-bottom: 0;
    border-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-ruler__item {
    align-items: flex-start;
    flex-wrap: wrap;
    padding: 14px 0 14px 16px;
    border-left: 1px solid var(--grid);
    white-space: normal;
    transition: border-color 180ms var(--ease), color 180ms var(--ease);
  }

  .page-faq .faq-ruler__item.is-active {
    border-left-color: var(--coral);
  }

  .page-faq .faq-panel {
    padding-top: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-tab,
  .page-faq .faq-item__q::after,
  .page-faq .faq-link,
  .page-faq .faq-crumb a,
  .page-faq .faq-ruler__item {
    transition-duration: 1ms;
  }

  .page-faq .faq-item[open] .faq-item__q::after {
    transform: none;
    content: "−";
  }
}
<<<END>>>