.page-faq {
  --faq-line: 1px solid rgba(39, 83, 107, 0.42);
  --faq-line-soft: 1px solid rgba(11, 28, 44, 0.14);
  --faq-gap: clamp(1.25rem, 3vw, 2.5rem);
  background: var(--paper);
  color: var(--graphite);
  font-family: var(--font-body);
}

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

/* ---------- 页面头部 ---------- */

.page-faq__head {
  padding-top: 1.25rem;
  padding-bottom: 2.25rem;
  border-bottom: 1px solid rgba(39, 83, 107, 0.3);
}

.page-faq .page-head__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(1.95rem, 6.4vw, 3.5rem);
  line-height: 1.12;
  letter-spacing: -0.012em;
  color: var(--ink-deep);
  margin: 0.65rem 0 1rem;
  max-width: 17ch;
}

.page-faq .page-head__lede {
  font-size: clamp(1rem, 2.2vw, 1.07rem);
  line-height: 1.9;
  color: var(--graphite);
  max-width: 62ch;
  margin: 0;
}

.page-faq__meta {
  margin: 1.1rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--muted);
  padding-left: 0.85rem;
  border-left: 2px solid var(--celadon);
}

/* ---------- 三栏骨架 ---------- */

.page-faq .rails {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
  padding-bottom: 3rem;
}

.page-faq .rail {
  align-self: start;
}

.page-faq .rail--left,
.page-faq .rail--right {
  display: none;
}

@media (min-width: 900px) {
  .page-faq .rails {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 2.5rem;
  }
  .page-faq .rail--left {
    display: block;
    position: sticky;
    top: 5.5rem;
  }
}

@media (min-width: 1180px) {
  .page-faq .rails {
    grid-template-columns: 148px minmax(0, 1fr) 186px;
    gap: 3rem;
  }
  .page-faq .rail--right {
    display: block;
    position: sticky;
    top: 5.5rem;
  }
}

.page-faq .rail__title {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 0.7rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid rgba(39, 83, 107, 0.35);
}

.page-faq .rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.05rem;
}

.page-faq .rail__link {
  display: block;
  padding: 0.42rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color 220ms var(--ease), border-color 220ms var(--ease);
}

.page-faq .rail__link:hover,
.page-faq .rail__link:focus-visible {
  color: var(--ink-deep);
  border-left-color: var(--celadon);
}

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

/* ---------- 主轴与章节 ---------- */

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

.page-faq .section {
  padding: 2.5rem 0;
}

.page-faq .faq-axis > .section:first-child {
  padding-top: 0.25rem;
}

@media (min-width: 900px) {
  .page-faq .section {
    padding: 3.25rem 0;
  }
  .page-faq .faq-axis > .section:first-child {
    padding-top: 0.5rem;
  }
}

.page-faq .section-title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(1.45rem, 4vw, 2.05rem);
  line-height: 1.2;
  letter-spacing: -0.008em;
  color: var(--ink-deep);
  margin: 0.55rem 0 0.85rem;
  max-width: 20ch;
}

.page-faq .section-lede {
  font-size: 0.98rem;
  line-height: 1.9;
  color: var(--graphite);
  max-width: 60ch;
  margin: 0 0 1.75rem;
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0;
}

.page-faq .num-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-bottom: 0.5rem;
}

/* ---------- 时间线 ---------- */

.page-faq__figure {
  margin: 0 0 2.25rem;
}

.page-faq .figure-frame__caption {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  line-height: 1.6;
}

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

.page-faq .faq-timeline__item {
  position: relative;
  margin-left: 1.05rem;
  padding: 0.2rem 0 2rem 3rem;
  border-left: 1px solid rgba(127, 179, 163, 0.55);
}

.page-faq .faq-timeline__item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-faq .faq-timeline__node {
  position: absolute;
  left: -1.05rem;
  top: 0;
  width: 2.1rem;
  height: 2.1rem;
  display: grid;
  place-items: center;
  background: var(--ink-deep);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  border: 1px solid var(--gold);
}

.page-faq .faq-timeline__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.12rem;
  line-height: 1.35;
  color: var(--ink-deep);
  margin: 0.3rem 0 0.4rem;
}

.page-faq .faq-timeline__text {
  font-size: 0.94rem;
  line-height: 1.88;
  color: var(--graphite);
  margin: 0 0 0.45rem;
  max-width: 56ch;
}

.page-faq .faq-timeline__meta {
  font-family: var(--font-mono);
  font-size: 0.69rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0;
}

/* ---------- 编号步骤卡 ---------- */

.page-faq .faq-steps-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

@media (min-width: 1024px) {
  .page-faq .faq-steps-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 300px);
    gap: 2.5rem;
    align-items: start;
  }
}

.page-faq .faq-steps {
  border-top: var(--faq-line);
}

.page-faq .faq-step {
  border-bottom: var(--faq-line);
  background: transparent;
}

.page-faq .faq-step__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.9rem;
  padding: 1.05rem 0.35rem;
  cursor: pointer;
  list-style: none;
  transition: background 200ms var(--ease);
}

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

.page-faq .faq-step__head::marker {
  content: "";
}

.page-faq .faq-step__head:hover {
  background: rgba(228, 222, 210, 0.5);
}

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

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-faq .faq-step__name {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--ink-deep);
}

.page-faq .faq-step__chev {
  position: relative;
  width: 13px;
  height: 13px;
}

.page-faq .faq-step__chev::before,
.page-faq .faq-step__chev::after {
  content: "";
  position: absolute;
  background: var(--ink-deep);
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.page-faq .faq-step__chev::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-step__chev::after {
  left: 50%;
  top: 0;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .faq-step[open] .faq-step__chev::after {
  opacity: 0;
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-step__body {
  padding: 0 0.35rem 1.4rem 2.5rem;
}

.page-faq .faq-step__facts {
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

.page-faq .faq-step__fact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.2rem;
}

@media (min-width: 640px) {
  .page-faq .faq-step__fact {
    grid-template-columns: 5.5rem minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }
}

.page-faq .faq-step__fact dt {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding-top: 0.15rem;
}

.page-faq .faq-step__fact dd {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.88;
  color: var(--graphite);
}

.page-faq__figure-steps {
  margin: 0;
}

/* ---------- 标签查找 ---------- */

.page-faq .faq-tags {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: var(--faq-line);
}

@media (min-width: 780px) {
  .page-faq .faq-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-faq .faq-tags__col {
  padding: 1.5rem 0;
  border-bottom: var(--faq-line);
}

@media (min-width: 780px) {
  .page-faq .faq-tags__col {
    padding: 1.75rem 1.6rem;
    border-bottom: none;
    border-right: var(--faq-line);
  }
  .page-faq .faq-tags__col:first-child {
    padding-left: 0;
  }
  .page-faq .faq-tags__col:last-child {
    padding-right: 0;
    border-right: none;
  }
}

.page-faq .faq-tags__title {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--ink-deep);
  margin: 0 0 0.55rem;
}

.page-faq .faq-tags__text {
  font-size: 0.9rem;
  line-height: 1.9;
  color: var(--graphite);
  margin: 0;
}

/* ---------- 常见问题筛选与分组 ---------- */

.page-faq .faq-filter {
  position: relative;
}

.page-faq .faq-filter__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

.page-faq .faq-filter__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.page-faq .faq-filter__btn {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.69rem;
  letter-spacing: 0.06em;
  color: var(--ink-deep);
  background: var(--paper-2);
  border: 1px solid rgba(39, 83, 107, 0.32);
  cursor: pointer;
  transition: background 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-faq .faq-filter__btn:hover {
  border-color: var(--celadon);
}

.page-faq #f-all:checked ~ .faq-filter__bar .faq-filter__btn[for="f-all"],
.page-faq #f-enter:checked ~ .faq-filter__bar .faq-filter__btn[for="f-enter"],
.page-faq #f-tag:checked ~ .faq-filter__bar .faq-filter__btn[for="f-tag"],
.page-faq #f-ver:checked ~ .faq-filter__bar .faq-filter__btn[for="f-ver"],
.page-faq #f-log:checked ~ .faq-filter__bar .faq-filter__btn[for="f-log"] {
  background: var(--celadon);
  border-color: var(--celadon);
  color: var(--ink-deep);
}

.page-faq .faq-filter__input:focus-visible ~ .faq-filter__bar {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-faq #f-enter:checked ~ .faq-filter__panels .faq-group:not([data-cat="enter"]),
.page-faq #f-tag:checked ~ .faq-filter__panels .faq-group:not([data-cat="tag"]),
.page-faq #f-ver:checked ~ .faq-filter__panels .faq-group:not([data-cat="ver"]),
.page-faq #f-log:checked ~ .faq-filter__panels .faq-group:not([data-cat="log"]) {
  display: none;
}

.page-faq .faq-group {
  border: var(--faq-line);
  border-bottom: none;
  background: var(--paper);
}

.page-faq .faq-group:last-child {
  border-bottom: var(--faq-line);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
  background: var(--paper-2);
  transition: background 200ms var(--ease);
}

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

.page-faq .faq-group__head::marker {
  content: "";
}

.page-faq .faq-group__head:hover {
  background: rgba(127, 179, 163, 0.24);
}

.page-faq .faq-group__head::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1;
}

.page-faq .faq-group[open] .faq-group__head::after {
  content: "\2212";
  color: var(--gold);
}

.page-faq .faq-group__idx {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-faq .faq-group__name {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.4;
  color: var(--ink-deep);
}

.page-faq .faq-group__body {
  padding: 1.1rem 1.1rem 1.3rem;
  border-top: var(--faq-line-soft);
}

.page-faq .faq-qa {
  margin: 0;
  display: grid;
  gap: 1.05rem;
}

.page-faq .faq-qa__item dt {
  font-weight: 600;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--ink-deep);
  margin-bottom: 0.3rem;
}

.page-faq .faq-qa__item dd {
  margin: 0;
  font-size: 0.91rem;
  line-height: 1.9;
  color: var(--graphite);
  max-width: 62ch;
}

.page-faq .faq-group__next {
  margin: 1.1rem 0 0;
  padding-top: 0.9rem;
  border-top: 1px dashed rgba(39, 83, 107, 0.32);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-group__next a {
  color: var(--ink-deep);
  text-decoration: underline;
  text-decoration-color: var(--gold);
  text-underline-offset: 3px;
}

/* ---------- 排查与联系 ---------- */

.page-faq .section--night {
  background: var(--ink-deep);
  color: var(--paper);
  padding: 2.25rem 1.4rem;
  margin: 1.75rem 0 0;
}

@media (min-width: 900px) {
  .page-faq .section--night {
    padding: 2.75rem 2.25rem;
  }
}

.page-faq .section--night .section-title {
  color: var(--paper);
}

.page-faq .section--night .section-lede {
  color: rgba(244, 241, 234, 0.82);
}

.page-faq .faq-sequence {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-faq .faq-sequence__item {
  display: grid;
  grid-template-columns: 1.85rem minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
}

.page-faq .faq-sequence__num {
  display: grid;
  place-items: center;
  width: 1.85rem;
  height: 1.85rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--gold);
  border: 1px solid rgba(201, 162, 39, 0.65);
}

.page-faq .faq-sequence__item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.88);
}

.page-faq .faq-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 1.15rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(127, 179, 163, 0.35);
}

.page-faq .faq-contact__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--celadon);
  margin-bottom: 0.35rem;
}

.page-faq .faq-contact__value {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-contact__note {
  margin: 1.5rem 0 0;
  font-size: 0.83rem;
  line-height: 1.9;
  color: rgba(244, 241, 234, 0.7);
  max-width: 62ch;
}

.page-faq .faq-contact__note a {
  color: var(--celadon);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 自助提示条 ---------- */

.page-faq .faq-hint {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  margin: 2.25rem 0 3.5rem;
  padding: 1.1rem 1.2rem;
  background: var(--paper-2);
  border: var(--faq-line);
  border-left: 3px solid var(--gold);
}

.page-faq .faq-hint__mark {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  padding-top: 0.2rem;
}

.page-faq .faq-hint p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--graphite);
}

/* ---------- 滚动显影 ---------- */

.page-faq [data-reveal] {
  opacity: 1;
}

.has-js .page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 260ms var(--ease), transform 260ms var(--ease);
}

.has-js .page-faq [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .has-js .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-faq .rail__link,
  .page-faq .faq-step__chev::before,
  .page-faq .faq-step__chev::after,
  .page-faq .faq-filter__btn {
    transition: none;
  }
}
<<<END>>>