.page-faq {
  --faq-rail: 76px;
  --faq-paper-line: rgba(27, 36, 48, .12);
  background: var(--yh-ink);
  color: var(--yh-paper);
  font-family: var(--yh-font-body);
  font-size: var(--yh-fs-body);
  line-height: 1.8;
  overflow-x: hidden;
}

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

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  font-family: var(--yh-font-head);
  text-wrap: balance;
}

.page-faq p {
  margin: 0 0 1em;
}

.page-faq p:last-child {
  margin-bottom: 0;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-top {
  padding: 22px 0 0;
  background: var(--yh-ink);
}

.page-faq .breadcrumb {
  font-size: var(--yh-fs-note);
  letter-spacing: .16em;
  color: var(--yh-mist);
  font-family: var(--yh-font-num);
}

.page-faq .breadcrumb a {
  color: var(--yh-mist);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--yh-paper);
}

.page-faq .breadcrumb__sep {
  margin: 0 .6em;
  opacity: .55;
}

/* ---------- 通用小标签 ---------- */
.page-faq .faq-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .7em;
  margin: 0 0 .9em;
  font-family: var(--yh-font-num);
  font-size: var(--yh-fs-note);
  letter-spacing: .22em;
  color: var(--yh-mist);
  text-transform: none;
}

.page-faq .faq-eyebrow--dark {
  color: var(--yh-mist);
}

.page-faq .faq-eyebrow__bar {
  width: 6px;
  height: 1em;
  background: var(--yh-coral);
  flex: none;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(36px, 6vw, 76px) 0 clamp(44px, 7vw, 92px);
  overflow: hidden;
  background: var(--yh-ink);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: min(700px, 86vw);
  height: min(700px, 86vw);
  background: radial-gradient(circle at 34% 34%, rgba(87, 166, 145, .24), rgba(240, 114, 79, .13) 46%, transparent 72%);
  pointer-events: none;
}

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

.page-faq .faq-hero__anno {
  color: var(--yh-coral);
  font-family: var(--yh-font-num);
  font-size: var(--yh-fs-note);
  letter-spacing: .24em;
  margin: 0 0 14px;
}

.page-faq .faq-hero__title {
  font-weight: 900;
  font-size: clamp(2.1rem, 8.4vw, 4.3rem);
  line-height: 1.12;
  letter-spacing: -.012em;
  color: var(--yh-paper);
  margin: 0 0 .42em;
  max-width: 15em;
}

.page-faq .faq-hero__lead {
  max-width: 34em;
  font-size: clamp(1.02rem, 1.7vw, 1.18rem);
  line-height: 1.8;
  color: #D5DFEA;
  margin: 0 0 clamp(24px, 4vw, 36px);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 指南说明 ---------- */
.page-faq .faq-intro {
  padding: 0 0 clamp(48px, 7vw, 92px);
  background: var(--yh-ink);
}

.page-faq .faq-intro__card {
  position: relative;
  background: var(--yh-board);
  border: 1px solid var(--yh-line);
  border-radius: 3px;
  padding: clamp(24px, 4vw, 44px);
  box-shadow: 7px 7px 0 rgba(227, 218, 202, .12);
}

.page-faq .faq-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-intro__h {
  font-weight: 800;
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  line-height: 1.25;
  color: var(--yh-paper);
  margin: 0 0 .6em;
}

.page-faq .faq-intro .prose {
  max-width: 34em;
  color: #CFDAE7;
  font-size: var(--yh-fs-body);
  line-height: 1.8;
}

.page-faq .faq-intro__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--yh-line);
  border: 1px solid var(--yh-line);
  border-radius: 2px;
  overflow: hidden;
}

.page-faq .faq-intro__facts li {
  background: var(--yh-ink);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-faq .faq-intro__k {
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--yh-mist);
  font-family: var(--yh-font-num);
}

.page-faq .faq-intro__v {
  font-family: var(--yh-font-head);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--yh-paper);
}

/* ---------- 九步 ---------- */
.page-faq .faq-steps {
  padding: clamp(48px, 8vw, 104px) 0;
  background: var(--yh-ink);
}

.page-faq .faq-steps__head {
  max-width: 40em;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-faq .faq-steps__h {
  font-weight: 900;
  font-size: clamp(1.75rem, 4.6vw, 2.5rem);
  line-height: 1.2;
  color: var(--yh-paper);
  margin: 0 0 .4em;
}

.page-faq .faq-steps__note {
  color: var(--yh-mist);
  max-width: 34em;
  font-size: 1rem;
}

.page-faq .faq-steps__figure {
  margin: 0 0 clamp(32px, 5vw, 56px);
  border: 1px solid var(--yh-line);
  border-radius: 3px;
  overflow: hidden;
}

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

.page-faq .faq-steps__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 36px);
}

.page-faq .step-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
  scroll-snap-type: x proximity;
}

.page-faq .step-rail__num {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--yh-line);
  background: var(--yh-board);
  color: var(--yh-mist);
  font-family: var(--yh-font-num);
  font-size: .8125rem;
  letter-spacing: .04em;
  text-decoration: none;
  scroll-snap-align: start;
  flex: none;
  transition: color var(--yh-dur-1) var(--yh-ease),
              border-color var(--yh-dur-1) var(--yh-ease),
              background var(--yh-dur-1) var(--yh-ease);
}

.page-faq .step-rail__num:hover,
.page-faq .step-rail__num:focus-visible {
  color: var(--yh-paper);
  border-color: var(--yh-coral);
}

.page-faq .step-rail__num.is-current {
  background: var(--yh-coral);
  border-color: var(--yh-coral);
  color: var(--yh-ink-text);
  font-weight: 700;
}

.page-faq .step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.page-faq .step-item {
  background: var(--yh-paper);
  color: var(--yh-ink-text);
  border: 1px solid var(--yh-paper-edge);
  border-radius: 3px;
  box-shadow: 5px 5px 0 rgba(39, 64, 94, .62);
  overflow: hidden;
  transition: transform var(--yh-dur-1) var(--yh-ease),
              box-shadow var(--yh-dur-1) var(--yh-ease);
}

.page-faq .step-item:hover {
  transform: translateY(-2px);
  box-shadow: 7px 7px 0 rgba(39, 64, 94, .78);
}

.page-faq .step-item__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

.page-faq .step-item__head:focus-visible {
  outline: 3px solid var(--yh-amber);
  outline-offset: -3px;
}

.page-faq .step-item__num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--yh-coral);
  color: var(--yh-ink-text);
  font-family: var(--yh-font-num);
  font-size: 1rem;
  font-weight: 700;
  flex: none;
}

.page-faq .step-item__title {
  font-family: var(--yh-font-head);
  font-weight: 800;
  font-size: clamp(1.02rem, 2.5vw, 1.18rem);
  line-height: 1.4;
  color: var(--yh-ink-text);
  min-width: 0;
}

.page-faq .step-item__chev {
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--yh-clay);
  border-bottom: 2px solid var(--yh-clay);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--yh-dur-2) var(--yh-ease);
  flex: none;
}

.page-faq .step-item__head[aria-expanded="true"] .step-item__chev {
  transform: rotate(225deg) translate(-2px, -2px);
}

.page-faq .step-item__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--yh-dur-2) var(--yh-ease);
}

.page-faq .step-item__head[aria-expanded="true"] + .step-item__body {
  grid-template-rows: 1fr;
}

.page-faq .step-item__inner {
  overflow: hidden;
  min-height: 0;
}

.page-faq .step-item__inner p {
  margin: 0;
  padding: 0 18px 18px 66px;
  color: var(--yh-ink-soft);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 42em;
}

/* ---------- 五类功能 ---------- */
.page-faq .faq-feature {
  background: var(--yh-paper);
  color: var(--yh-ink-text);
  padding: clamp(48px, 8vw, 104px) 0;
}

.page-faq .faq-feature__h {
  font-weight: 900;
  font-size: clamp(1.75rem, 4.6vw, 2.5rem);
  line-height: 1.2;
  color: var(--yh-ink);
  margin: 0 0 .35em;
  max-width: 18em;
}

.page-faq .faq-feature__lead {
  color: var(--yh-ink-soft);
  max-width: 34em;
  margin: 0 0 clamp(28px, 4vw, 46px);
}

.page-faq .feature-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-faq .feature-card {
  position: relative;
  background: #FFFDF8;
  border: 1px solid var(--yh-paper-edge);
  border-left: 6px solid var(--yh-line);
  border-radius: 2px;
  padding: 20px 22px;
  min-width: 0;
}

.page-faq .feature-card--e {
  border-left-color: var(--yh-celadon);
  background: linear-gradient(120deg, #EFF7F3 0%, #FFFDF8 55%);
}

.page-faq .feature-card__title {
  display: flex;
  align-items: baseline;
  gap: .7em;
  font-weight: 800;
  font-size: clamp(1.06rem, 2.4vw, 1.22rem);
  line-height: 1.4;
  color: var(--yh-ink);
  margin: 0 0 .35em;
}

.page-faq .feature-card__idx {
  font-family: var(--yh-font-num);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--yh-clay);
  flex: none;
}

.page-faq .feature-card__text {
  color: var(--yh-ink-soft);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 34em;
}

.page-faq .faq-feature__more {
  margin: clamp(26px, 4vw, 40px) 0 0;
  color: var(--yh-ink-soft);
  max-width: 46em;
}

.page-faq .faq-feature__more a {
  color: var(--yh-clay);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(179, 63, 34, .38);
}

.page-faq .faq-feature__more a:hover,
.page-faq .faq-feature__more a:focus-visible {
  border-bottom-color: var(--yh-clay);
}

/* ---------- 问答 ---------- */
.page-faq .faq-qa {
  padding: clamp(48px, 8vw, 104px) 0;
  background: var(--yh-ink);
  border-top: 1px solid var(--yh-line);
}

.page-faq .faq-qa__h {
  font-weight: 900;
  font-size: clamp(1.75rem, 4.6vw, 2.5rem);
  line-height: 1.2;
  color: var(--yh-paper);
  margin: 0 0 .3em;
}

.page-faq .faq-qa__lead {
  color: var(--yh-mist);
  max-width: 34em;
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: 1rem;
}

.page-faq .faq-qa .filter-rail {
  margin-bottom: 12px;
}

.page-faq .faq-qa .filter-status {
  font-family: var(--yh-font-num);
  font-size: var(--yh-fs-note);
  letter-spacing: .14em;
  color: var(--yh-mist);
  min-height: 1.5em;
  margin: 0 0 clamp(20px, 3vw, 32px);
}

.page-faq .qa-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-faq .qa-group {
  background: var(--yh-board);
  border: 1px solid var(--yh-line);
  border-radius: 3px;
  padding: 20px 20px 6px;
  min-width: 0;
}

.page-faq .qa-group[hidden] {
  display: none;
}

.page-faq .qa-group__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
}

.page-faq .qa-group__bar {
  width: 6px;
  height: 1.15em;
  border-radius: 1px;
  background: var(--yh-line);
  flex: none;
}

.page-faq .qa-group[data-topics~="coral"] .qa-group__bar {
  background: var(--yh-coral);
}

.page-faq .qa-group[data-topics~="celadon"] .qa-group__bar {
  background: var(--yh-celadon);
}

.page-faq .qa-group[data-topics~="amber"] .qa-group__bar {
  background: var(--yh-amber);
}

.page-faq .qa-group__title {
  margin: 0;
  font-weight: 800;
  font-size: 1.1rem;
  line-height: 1.4;
  color: var(--yh-paper);
}

.page-faq .qa-group__count {
  margin-left: auto;
  font-family: var(--yh-font-num);
  font-size: .75rem;
  letter-spacing: .12em;
  color: var(--yh-mist);
  flex: none;
}

.page-faq .qa-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-faq .qa-item__q {
  margin: 0 0 .3em;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.65;
  color: var(--yh-paper);
}

.page-faq .qa-item__q::before {
  content: "Q";
  font-family: var(--yh-font-num);
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--yh-coral);
  margin-right: .6em;
}

.page-faq .qa-item__a {
  margin: 0;
  color: #C4D1E0;
  font-size: .9688rem;
  line-height: 1.8;
  max-width: 34em;
}

/* ---------- 设备差异 ---------- */
.page-faq .faq-device {
  background: var(--yh-paper);
  color: var(--yh-ink-text);
  padding: clamp(48px, 8vw, 104px) 0;
}

.page-faq .faq-device__h {
  font-weight: 900;
  font-size: clamp(1.75rem, 4.6vw, 2.5rem);
  line-height: 1.2;
  color: var(--yh-ink);
  margin: 0 0 .35em;
  max-width: 18em;
}

.page-faq .faq-device__lead {
  color: var(--yh-ink-soft);
  max-width: 34em;
  margin: 0 0 clamp(26px, 4vw, 44px);
}

.page-faq .faq-device__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

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

.page-faq .faq-device .device-switch {
  margin-bottom: 20px;
}

.page-faq .device-pane {
  display: none;
}

.page-faq .device-pane.is-active {
  display: block;
}

.page-faq .device-pane__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-faq .device-pane__list li {
  position: relative;
  padding-left: 24px;
  color: var(--yh-ink-soft);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 34em;
}

.page-faq .device-pane__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .74em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--yh-celadon);
}

.page-faq .faq-device__figure {
  margin: 0;
  border: 1px solid var(--yh-paper-edge);
  border-radius: 3px;
  overflow: hidden;
  box-shadow: 6px 6px 0 rgba(227, 218, 202, .9);
}

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

/* ---------- 兜底提问 ---------- */
.page-faq .faq-help {
  position: relative;
  padding: clamp(48px, 8vw, 104px) 0;
  background: linear-gradient(158deg, #0A1626 0%, #10203A 46%, #174742 100%);
  overflow: hidden;
}

.page-faq .faq-help::before {
  content: "";
  position: absolute;
  bottom: -30%;
  left: -12%;
  width: min(520px, 74vw);
  height: min(520px, 74vw);
  background: radial-gradient(circle at 50% 50%, rgba(87, 166, 145, .22), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-help__card {
  position: relative;
  max-width: 48em;
}

.page-faq .faq-help__h {
  font-weight: 900;
  font-size: clamp(1.65rem, 4.4vw, 2.4rem);
  line-height: 1.22;
  color: var(--yh-paper);
  margin: 0 0 .4em;
}

.page-faq .faq-help__p {
  color: #D3DDEA;
  max-width: 34em;
  font-size: 1rem;
}

.page-faq .faq-help__p--last a {
  color: var(--yh-celadon-lt);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid rgba(143, 211, 192, .45);
}

.page-faq .faq-help__p--last a:hover,
.page-faq .faq-help__p--last a:focus-visible {
  border-bottom-color: var(--yh-celadon-lt);
}

.page-faq .faq-help__channels {
  list-style: none;
  margin: 0 0 1.4em;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .faq-help__channels li {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .7em;
  min-width: 0;
}

.page-faq .faq-help__k {
  font-family: var(--yh-font-num);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--yh-mist);
  flex: none;
}

.page-faq .faq-help__channels a,
.page-faq .faq-help__v {
  color: var(--yh-paper);
  font-size: 1rem;
  font-family: var(--yh-font-num);
  text-decoration: none;
  word-break: break-word;
}

.page-faq .faq-help__channels a {
  border-bottom: 1px solid rgba(246, 242, 233, .35);
}

.page-faq .faq-help__channels a:hover,
.page-faq .faq-help__channels a:focus-visible {
  color: var(--yh-celadon-lt);
  border-bottom-color: var(--yh-celadon-lt);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-faq .faq-intro__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-help__channels {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 14px 34px;
  }
}

@media (min-width: 760px) {
  .page-faq .feature-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }

  .page-faq .feature-card--a { grid-column: span 5; }
  .page-faq .feature-card--b { grid-column: span 7; }
  .page-faq .feature-card--c { grid-column: span 7; }
  .page-faq .feature-card--d { grid-column: span 5; }
  .page-faq .feature-card--e { grid-column: span 12; }

  .page-faq .qa-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 20px;
  }

  .page-faq .qa-group:nth-child(even) {
    margin-top: 30px;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-intro__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-faq .faq-steps__body {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
  }

  .page-faq .step-rail {
    position: sticky;
    top: 132px;
    align-self: start;
  }

  .page-faq .step-rail__list {
    flex-direction: column;
    gap: 8px;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-device__grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-faq .faq-device__figure {
    margin-top: 56px;
  }
}

@media (min-width: 1080px) {
  .page-faq .qa-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 28px;
  }

  .page-faq .qa-group:nth-child(even) {
    margin-top: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .step-item,
  .page-faq .step-item__body,
  .page-faq .step-item__chev,
  .page-faq .step-rail__num {
    transition: none;
  }

  .page-faq .step-item:hover {
    transform: none;
  }
}
<<<END>>>