.page-faq {
  --faq-line: rgba(124, 155, 163, .28);
  --faq-card: rgba(230, 242, 241, .78);
  display: block;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(230, 242, 241, .9) 0%, rgba(251, 246, 236, .96) 34%, rgba(230, 242, 241, .9) 100%);
  padding-bottom: var(--sp-7);
}

.page-faq .shell {
  padding-top: var(--sp-3);
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  font-size: 14px;
  color: var(--mist-deep);
}

.page-faq .faq-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-crumb li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

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

.page-faq .faq-crumb a {
  color: var(--tide);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease);
}

.page-faq .faq-crumb a:hover,
.page-faq .faq-crumb a:focus-visible {
  border-bottom-color: currentColor;
}

.page-faq .faq-crumb [aria-current="page"] {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  margin-top: var(--sp-3);
  padding: var(--sp-5) var(--sp-3) var(--sp-5);
  border-radius: var(--r-lg);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(63, 210, 199, .34), transparent 62%),
    radial-gradient(86% 74% at 0% 110%, rgba(255, 107, 74, .18), transparent 64%),
    linear-gradient(140deg, #E6F2F1 0%, #FBF6EC 58%, #E6F2F1 100%);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -34%;
  width: 62%;
  height: 84%;
  background-image: repeating-linear-gradient(112deg, rgba(14, 106, 114, .16) 0 2px, transparent 2px 26px);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero h1 {
  margin: var(--sp-2) 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 34px;
  line-height: 1.24;
  letter-spacing: -.01em;
  max-width: 18ch;
}

.page-faq .faq-hero .lede {
  margin: var(--sp-3) 0 0;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist-deep);
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-1);
  margin: var(--sp-4) 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-facts li {
  padding: 7px 14px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(14, 106, 114, .26);
  background: rgba(255, 255, 255, .62);
  font-size: 14px;
  color: var(--ink);
  line-height: 1.4;
}

.page-faq .faq-facts .mono {
  color: var(--tide);
  font-weight: 700;
}

.page-faq .faq-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-6);
}

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

.page-faq .faq-rail {
  order: -1;
  min-width: 0;
}

.page-faq .faq-rail .toc {
  border-radius: var(--r-md);
  border: 1px solid rgba(14, 106, 114, .2);
  background: rgba(255, 255, 255, .7);
  padding: var(--sp-3);
}

.page-faq .faq-rail .toc__title {
  margin: 0 0 var(--sp-2);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist-deep);
}

.page-faq .faq-rail ul {
  display: flex;
  gap: var(--sp-1);
  margin: 0;
  padding: 0 0 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail li {
  flex: none;
}

.page-faq .faq-rail a {
  display: block;
  padding: 7px 13px;
  border-radius: var(--r-pill);
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
  background: var(--glass);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: border-color .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
}

.page-faq .faq-rail a:hover,
.page-faq .faq-rail a:focus-visible {
  border-color: var(--gold);
}

.page-faq .faq-rail a[data-active] {
  border-color: var(--gold);
  background: rgba(242, 181, 68, .16);
  color: var(--deep);
  font-weight: 600;
}

/* ---------- 通用小标题 ---------- */
.page-faq .faq-h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.32;
  color: var(--deep);
}

.page-faq .faq-sub {
  margin: var(--sp-2) 0 0;
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-deep);
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  padding-top: var(--sp-2);
}

.page-faq .faq-cats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.page-faq .faq-cat {
  position: relative;
  display: block;
  padding: var(--sp-3);
  border-radius: var(--r-md);
  background: var(--faq-card);
  border: 1px solid rgba(14, 106, 114, .18);
  text-decoration: none;
  color: inherit;
  transition: transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  transform: translateY(-3px);
  border-color: var(--coral);
  background: var(--sand);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-cat__no {
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-faq .faq-cat__name {
  display: block;
  margin-top: 6px;
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--deep);
}

.page-faq .faq-cat__desc {
  display: block;
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-deep);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-top: var(--sp-6);
  scroll-margin-top: 96px;
}

.page-faq .faq-group__head {
  padding-top: var(--sp-3);
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-group__head::before {
  content: "";
  display: block;
  width: 62px;
  height: 4px;
  margin-bottom: var(--sp-2);
  border-radius: 2px;
  background: linear-gradient(90deg, var(--coral), var(--gold));
}

.page-faq .faq-group__no {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--tide);
}

.page-faq .faq-group__head h2 {
  margin: 6px 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 25px;
  line-height: 1.32;
  color: var(--deep);
}

.page-faq .faq-group__sum {
  margin: var(--sp-2) 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-deep);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  position: relative;
  margin-top: var(--sp-2);
  border-radius: var(--r-md);
  background: var(--sand);
  border: 1px solid rgba(124, 155, 163, .24);
  overflow: hidden;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}

.page-faq .qa::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--coral), var(--gold));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .38s var(--ease);
}

.page-faq .qa[open] {
  border-color: rgba(255, 107, 74, .42);
  box-shadow: var(--shadow-soft);
}

.page-faq .qa[open]::before {
  transform: scaleY(1);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-2);
  padding: 18px 18px 18px 22px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.62;
  color: var(--ink);
  transition: color .25s var(--ease);
}

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

.page-faq .qa summary:hover {
  color: var(--deep);
}

.page-faq .qa__mark {
  flex: none;
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  margin-left: auto;
  border-radius: 50%;
  border: 1.5px solid var(--tide);
  transition: border-color .3s var(--ease);
}

.page-faq .qa__mark::before,
.page-faq .qa__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  background: var(--tide);
  transition: transform .3s var(--ease), opacity .3s var(--ease), background .3s var(--ease);
}

.page-faq .qa__mark::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .qa__mark::after {
  width: 1.5px;
  height: 10px;
}

.page-faq .qa[open] .qa__mark {
  border-color: var(--coral);
}

.page-faq .qa[open] .qa__mark::before {
  background: var(--coral);
}

.page-faq .qa[open] .qa__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__a {
  padding: 0 18px 20px 22px;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 44ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist-deep);
}

/* ---------- 小屏步骤 ---------- */
.page-faq .faq-mobile {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
  margin-top: var(--sp-4);
}

.page-faq .faq-steps {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps li {
  position: relative;
  display: flex;
  gap: var(--sp-2);
  padding-bottom: var(--sp-4);
}

.page-faq .faq-steps li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 38px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, rgba(14, 106, 114, .42), rgba(14, 106, 114, .06));
}

.page-faq .faq-steps li:last-child {
  padding-bottom: 0;
}

.page-faq .faq-steps li:last-child::before {
  display: none;
}

.page-faq .faq-steps__no {
  flex: none;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--deep);
  color: var(--gold);
  font-size: 14px;
  font-weight: 700;
}

.page-faq .faq-steps__body {
  min-width: 0;
  padding-top: 2px;
}

.page-faq .faq-steps__body strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--deep);
}

.page-faq .faq-steps__body p {
  margin: 6px 0 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist-deep);
}

.page-faq details.qa + details.qa {
  margin-top: var(--sp-2);
}

.page-faq .qa:first-of-type {
  margin-top: var(--sp-3);
}

/* ---------- 媒体 ---------- */
.page-faq .media {
  position: relative;
  display: block;
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--placeholder, rgba(124, 155, 163, .18));
}

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

.page-faq .media--soft {
  box-shadow: var(--shadow-soft);
}

.page-faq .media__cap {
  padding: 10px 14px 12px;
  background: rgba(255, 255, 255, .78);
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist-deep);
}

.page-faq .faq-mobile__figure {
  margin-top: var(--sp-1);
}

/* ---------- 设备对照 ---------- */
.page-faq .faq-compare {
  position: relative;
  overflow: hidden;
  margin-top: var(--sp-6);
  padding: var(--sp-5) var(--sp-3) var(--sp-5);
  border-radius: var(--r-lg);
  background: linear-gradient(152deg, #063B45 0%, #04252C 58%, #0E6A72 132%);
  color: var(--glass);
  box-shadow: var(--shadow-lift);
  scroll-margin-top: 96px;
}

.page-faq .faq-compare::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(63, 210, 199, .2) 1px, transparent 1px);
  background-size: 26px 26px;
  opacity: .55;
  pointer-events: none;
}

.page-faq .faq-compare > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-compare h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.32;
  color: var(--sand);
}

.page-faq .faq-compare__lead {
  margin: var(--sp-2) 0 0;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.8;
  color: rgba(230, 242, 241, .82);
}

.page-faq .faq-compare__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.page-faq .faq-lane {
  padding: var(--sp-3);
  border-radius: var(--r-md);
  background: rgba(230, 242, 241, .07);
  border: 1px solid rgba(63, 210, 199, .26);
}

.page-faq .faq-lane--short {
  border-color: rgba(242, 181, 68, .42);
  background: rgba(242, 181, 68, .1);
}

.page-faq .faq-lane__title {
  margin: 0 0 var(--sp-2);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--wave);
}

.page-faq .faq-lane--short .faq-lane__title {
  color: var(--gold);
}

.page-faq .faq-lane dl {
  display: grid;
  gap: var(--sp-2);
  margin: 0;
}

.page-faq .faq-lane dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(230, 242, 241, .62);
}

.page-faq .faq-lane dd {
  margin: 5px 0 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(230, 242, 241, .9);
}

.page-faq .faq-compare__note {
  margin: var(--sp-4) 0 0;
  padding: 12px 16px;
  border-radius: var(--r-sm);
  border-left: 3px solid var(--gold);
  background: rgba(242, 181, 68, .12);
  font-size: 15px;
  line-height: 1.72;
  color: rgba(230, 242, 241, .92);
}

.page-faq .faq-compare__figure {
  margin-top: var(--sp-4);
  background: rgba(230, 242, 241, .08);
}

.page-faq .faq-compare__figure .media__cap {
  background: rgba(4, 37, 44, .6);
  color: rgba(230, 242, 241, .78);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-assist {
  margin-top: var(--sp-6);
  padding: var(--sp-5) var(--sp-3);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(251, 246, 236, .96) 0%, rgba(230, 242, 241, .92) 100%);
  border: 1px solid rgba(242, 181, 68, .45);
  scroll-margin-top: 96px;
}

.page-faq .faq-assist h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 26px;
  line-height: 1.32;
  color: var(--deep);
}

.page-faq .faq-assist__lead {
  margin: var(--sp-2) 0 0;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist-deep);
}

.page-faq .faq-steps--assist {
  margin-top: var(--sp-4);
}

.page-faq .faq-contact {
  display: grid;
  gap: var(--sp-2);
  margin-top: var(--sp-2);
  padding: var(--sp-3);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, .82);
  border: 1px dashed rgba(14, 106, 114, .34);
}

.page-faq .faq-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px var(--sp-2);
  align-items: baseline;
  padding-bottom: var(--sp-2);
  border-bottom: 1px solid rgba(124, 155, 163, .22);
}

.page-faq .faq-contact__row:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-contact__label {
  flex: none;
  min-width: 84px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--tide);
}

.page-faq .faq-contact__value {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  word-break: break-word;
}

.page-faq .faq-contact__value a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 74, .6);
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

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

.page-faq .faq-contact__note {
  margin: var(--sp-2) 0 0;
  padding-top: var(--sp-2);
  border-top: 1px solid rgba(124, 155, 163, .22);
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist-deep);
}

.page-faq .faq-assist__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-hero {
    padding: var(--sp-6) var(--sp-5) var(--sp-6);
  }

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

  .page-faq .faq-compare,
  .page-faq .faq-assist {
    padding-left: var(--sp-5);
    padding-right: var(--sp-5);
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero h1 {
    font-size: 46px;
  }

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

  .page-faq .faq-mobile {
    grid-template-columns: minmax(0, 1fr) minmax(0, 360px);
    align-items: start;
    gap: var(--sp-5);
  }

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

  .page-faq .faq-h2,
  .page-faq .faq-compare h2,
  .page-faq .faq-assist h2 {
    font-size: 30px;
  }

  .page-faq .faq-group__head h2 {
    font-size: 27px;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-hero {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    column-gap: var(--sp-5);
  }

  .page-faq .faq-hero > .eyebrow {
    grid-column: 1 / -1;
  }

  .page-faq .faq-hero h1 {
    grid-column: 1;
    font-size: 54px;
  }

  .page-faq .faq-hero .lede {
    grid-column: 1;
  }

  .page-faq .faq-facts {
    grid-column: 2;
    grid-row: 2 / span 2;
    align-self: end;
    justify-content: flex-start;
    margin-top: 0;
  }

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

  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 280px;
    column-gap: var(--sp-6);
    align-items: start;
  }

  .page-faq .faq-rail {
    order: 0;
  }

  .page-faq .faq-rail .toc {
    position: sticky;
    top: 108px;
    background: rgba(255, 255, 255, .86);
    backdrop-filter: blur(6px);
  }

  .page-faq .faq-rail ul {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

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

  .page-faq .faq-rail a {
    border-radius: var(--r-sm);
    background: transparent;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-faq .faq-rail a:hover,
  .page-faq .faq-rail a:focus-visible {
    background: var(--glass);
    border-color: transparent;
    border-left-color: var(--gold);
  }

  .page-faq .faq-rail a[data-active] {
    border-color: transparent;
    border-left-color: var(--gold);
    background: rgba(242, 181, 68, .14);
  }

  .page-faq .faq-cats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-cat,
  .page-faq .qa,
  .page-faq .qa::before,
  .page-faq .qa__mark::before,
  .page-faq .qa__mark::after,
  .page-faq .faq-rail a {
    transition: none;
  }

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