.page-faq {
  background: var(--sf-ink);
  color: var(--sf-fog);
  font-family: var(--sf-font-body);
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 62px) 0 clamp(26px, 4vw, 52px);
  background: linear-gradient(158deg, var(--sf-night) 0%, var(--sf-night) 46%, var(--sf-ink) 46%, var(--sf-ink) 100%);
  border-bottom: 2px solid var(--sf-line-strong);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -46%;
  width: 62%;
  height: 300px;
  background: radial-gradient(circle at 40% 40%, rgba(200, 255, 61, 0.16), transparent 68%);
  pointer-events: none;
}

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

.page-faq .sf-breadcrumb {
  margin-bottom: 18px;
}

.page-faq .sf-breadcrumb__link {
  color: rgba(242, 247, 243, 0.66);
  text-decoration: none;
}

.page-faq .sf-breadcrumb__link:hover,
.page-faq .sf-breadcrumb__link:focus-visible {
  color: var(--sf-lime);
}

.page-faq .sf-breadcrumb__sep {
  color: var(--sf-orange);
}

.page-faq .sf-kicker {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 12px;
  border: 1px solid var(--sf-line-strong);
  border-radius: 999px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sf-lime);
  background: rgba(6, 42, 36, 0.6);
}

.page-faq .faq-hero__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.14;
  letter-spacing: -0.015em;
  color: var(--sf-fog);
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(242, 247, 243, 0.78);
}

.page-faq .faq-hero__stats {
  list-style: none;
  margin: clamp(20px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-faq .faq-hero__stat {
  padding: 12px 14px;
  border: 1px solid var(--sf-line-strong);
  border-radius: var(--sf-radius);
  background: var(--sf-card);
  box-shadow: var(--sf-shadow-hard);
}

.page-faq .faq-hero__stat b {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: clamp(19px, 3vw, 26px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--sf-lime);
  line-height: 1.1;
}

.page-faq .faq-hero__stat span {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.5;
  color: rgba(242, 247, 243, 0.58);
}

/* ---------- 主结构 ---------- */
.page-faq .faq-shell {
  max-width: var(--sf-shell);
  margin-inline: auto;
  padding-inline: var(--sf-pad);
  margin-top: clamp(26px, 4vw, 48px);
  display: grid;
  gap: clamp(18px, 3vw, 32px);
}

.page-faq .faq-stream {
  min-width: 0;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

/* ---------- 主题索引 ---------- */
.page-faq .faq-side {
  border: 2px solid var(--sf-line-strong);
  border-radius: var(--sf-radius-lg);
  background: var(--sf-card);
  padding: 14px;
  box-shadow: var(--sf-shadow-hard);
}

.page-faq .faq-side__title {
  margin: 0 0 10px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--sf-lime);
}

.page-faq .faq-side__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .faq-side__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 10px;
  border-left: 3px solid transparent;
  border-radius: 6px;
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  color: rgba(242, 247, 243, 0.74);
  transition: background 180ms var(--sf-ease), color 180ms var(--sf-ease), border-color 180ms var(--sf-ease);
}

.page-faq .faq-side__link:hover,
.page-faq .faq-side__link:focus-visible {
  background: rgba(200, 255, 61, 0.1);
  border-left-color: var(--sf-lime);
  color: var(--sf-fog);
}

.page-faq .faq-side__no {
  font-family: var(--sf-font-mono);
  font-size: 11px;
  color: var(--sf-orange);
}

/* ---------- 章节通用 ---------- */
.page-faq .faq-block {
  min-width: 0;
}

.page-faq .faq-block__head {
  margin-bottom: 18px;
}

.page-faq .faq-block__title {
  margin: 0;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--sf-fog);
  overflow-wrap: anywhere;
}

.page-faq .faq-block__text {
  margin: 10px 0 0;
  max-width: 66ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(242, 247, 243, 0.72);
}

.page-faq .faq-block__note {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 3px solid var(--sf-orange);
  border-radius: 0 var(--sf-radius) var(--sf-radius) 0;
  background: rgba(15, 44, 42, 0.72);
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(242, 247, 243, 0.74);
}

.page-faq .faq-inline-link {
  color: var(--sf-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

/* ---------- 筛选条 ---------- */
.page-faq .faq-searchbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px;
  margin-bottom: 16px;
  border: 2px solid var(--sf-line-strong);
  border-radius: 999px;
  background: var(--sf-glass);
  box-shadow: var(--sf-shadow-hard);
}

.page-faq .faq-searchbar .sf-filters__btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  padding: 8px 15px;
  font-family: var(--sf-font-body);
  font-size: 13.5px;
  font-weight: 500;
  line-height: 1.4;
  color: rgba(242, 247, 243, 0.72);
  cursor: pointer;
  transition: background 180ms var(--sf-ease), color 180ms var(--sf-ease), border-color 180ms var(--sf-ease);
}

.page-faq .faq-searchbar .sf-filters__btn:hover {
  color: var(--sf-fog);
  border-color: var(--sf-line-strong);
}

.page-faq .faq-searchbar .sf-filters__btn:focus-visible {
  outline: 2px solid var(--sf-lime);
  outline-offset: 2px;
}

.page-faq .faq-searchbar .sf-filters__btn[aria-pressed="true"] {
  background: var(--sf-lime);
  border-color: var(--sf-lime);
  color: var(--sf-ink);
  font-weight: 700;
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-list {
  display: block;
}

.page-faq .faq-item {
  margin: 0;
  border: 1px solid var(--sf-line-strong);
  border-radius: var(--sf-radius);
  background: var(--sf-card);
  box-shadow: var(--sf-shadow-soft);
  overflow: hidden;
}

.page-faq .faq-item + .faq-item {
  margin-top: 10px;
}

.page-faq .faq-item__q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .faq-item__trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  color: var(--sf-fog);
  font-family: var(--sf-font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  transition: background 180ms var(--sf-ease);
}

.page-faq .faq-item__trigger:hover {
  background: rgba(200, 255, 61, 0.06);
}

.page-faq .faq-item__trigger:focus-visible {
  outline: 2px solid var(--sf-lime);
  outline-offset: -2px;
}

.page-faq .faq-item__trigger[aria-expanded="true"] {
  background: rgba(200, 255, 61, 0.08);
}

.page-faq .faq-item__no {
  flex: none;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sf-orange);
}

.page-faq .faq-item__label {
  flex: 1 1 auto;
  min-width: 0;
  overflow-wrap: anywhere;
}

.page-faq .faq-item__icon {
  flex: none;
  position: relative;
  width: 22px;
  height: 22px;
  border: 1px solid var(--sf-line-strong);
  border-radius: 50%;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  top: 50%;
  height: 1.5px;
  background: var(--sf-lime);
  transform: translateY(-50%);
  transition: transform 200ms var(--sf-ease);
}

.page-faq .faq-item__icon::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .faq-item__trigger[aria-expanded="true"] .faq-item__icon::after {
  transform: translateY(-50%) rotate(0deg);
}

.page-faq .faq-item__panel {
  padding: 0 16px 16px 44px;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(242, 247, 243, 0.76);
  border-top: 1px dashed var(--sf-line);
  padding-top: 14px;
}

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

.page-faq .faq-item__panel p {
  margin: 0;
}

/* ---------- 回看步骤 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 14px;
  border: 1px solid var(--sf-line);
  border-left: 3px solid var(--sf-orange);
  border-radius: 0 var(--sf-radius) var(--sf-radius) 0;
  background: rgba(15, 44, 42, 0.72);
}

.page-faq .faq-steps__no {
  font-family: var(--sf-font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--sf-lime);
  line-height: 1.6;
}

.page-faq .faq-steps__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(242, 247, 243, 0.78);
}

.page-faq .faq-steps__text strong {
  color: var(--sf-lime);
  font-weight: 700;
}

/* ---------- 图片容器 ---------- */
.page-faq .faq-media {
  margin: 20px 0 0;
  border: 2px solid var(--sf-line-strong);
  border-radius: var(--sf-radius-lg);
  overflow: hidden;
  background: var(--sf-night);
  box-shadow: var(--sf-shadow-hard);
}

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

.page-faq .faq-media figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--sf-line);
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: rgba(242, 247, 243, 0.55);
}

/* ---------- 栏目分类链条 ---------- */
.page-faq .faq-chain {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: chain;
}

.page-faq .faq-chain__step {
  position: relative;
  padding: 14px 16px 14px 18px;
  border: 1px solid var(--sf-line-strong);
  border-radius: var(--sf-radius);
  background: var(--sf-card);
}

.page-faq .faq-chain__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--sf-orange);
}

.page-faq .faq-chain__step b {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--sf-lime);
  margin-bottom: 6px;
}

.page-faq .faq-chain__step span {
  display: block;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(242, 247, 243, 0.76);
}

/* ---------- 订阅三档 ---------- */
.page-faq .faq-grid3 {
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-mini {
  padding: 15px 16px;
  border: 1px solid var(--sf-line-strong);
  border-radius: var(--sf-radius);
  background: var(--sf-card);
  box-shadow: var(--sf-shadow-soft);
}

.page-faq .faq-mini__tag {
  display: inline-block;
  margin: 0 0 9px;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(200, 255, 61, 0.16);
  color: var(--sf-lime);
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
}

.page-faq .faq-mini__tag--orange {
  background: rgba(255, 106, 43, 0.18);
  color: var(--sf-orange);
}

.page-faq .faq-mini__title {
  margin: 0 0 7px;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--sf-fog);
}

.page-faq .faq-mini__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(242, 247, 243, 0.7);
}

/* ---------- 日历节奏 ---------- */
.page-faq .faq-rhythm {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 2px solid var(--sf-line-strong);
  border-radius: var(--sf-radius-lg);
  background: linear-gradient(120deg, rgba(10, 29, 56, 0.9), rgba(6, 42, 36, 0.9));
  box-shadow: var(--sf-shadow-hard);
}

.page-faq .faq-rhythm__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 11px 12px;
  border-radius: 8px;
  background: rgba(15, 44, 42, 0.7);
}

.page-faq .faq-rhythm__label {
  font-family: var(--sf-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--sf-orange);
  padding-top: 2px;
}

.page-faq .faq-rhythm__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(242, 247, 243, 0.76);
}

/* ---------- 设备与账号 ---------- */
.page-faq .faq-devices {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-devices__item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 15px;
  border: 1px solid var(--sf-line-strong);
  border-radius: var(--sf-radius);
  background: var(--sf-card);
}

.page-faq .faq-devices__icon {
  color: var(--sf-lime);
  margin-top: 2px;
}

.page-faq .faq-devices__title {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--sf-fog);
}

.page-faq .faq-devices__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.74;
  color: rgba(242, 247, 243, 0.72);
}

/* ---------- 人工协助 ---------- */
.page-faq .faq-block--contact {
  border: 2px solid var(--sf-line-strong);
  border-radius: var(--sf-radius-lg);
  padding: clamp(16px, 3vw, 28px);
  background: linear-gradient(150deg, rgba(10, 29, 56, 0.86), rgba(15, 44, 42, 0.9));
  box-shadow: var(--sf-shadow-hard);
}

.page-faq .faq-contact {
  display: grid;
  gap: 8px;
}

.page-faq .faq-contact__line {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dashed var(--sf-line);
}

.page-faq .faq-contact__label {
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--sf-stand);
  color: rgba(201, 210, 208, 0.72);
}

.page-faq .faq-contact__value {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--sf-fog);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .faq-contact__actions .sf-btn {
  text-decoration: none;
}

/* ---------- 底部主题导航 ---------- */
.page-faq .faq-topicnav {
  margin-top: clamp(36px, 6vw, 72px);
  padding-top: clamp(26px, 4vw, 44px);
  border-top: 2px solid var(--sf-line-strong);
}

.page-faq .faq-topicnav__head {
  margin-bottom: 16px;
}

.page-faq .faq-topicnav__title {
  margin: 0;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.25;
  color: var(--sf-fog);
}

.page-faq .faq-topicnav__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 247, 243, 0.66);
}

.page-faq .faq-topics {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-topics__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "no name"
    "no desc";
  column-gap: 12px;
  row-gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--sf-line-strong);
  border-radius: var(--sf-radius);
  background: var(--sf-card);
  text-decoration: none;
  transition: transform 200ms var(--sf-ease), border-color 200ms var(--sf-ease), box-shadow 200ms var(--sf-ease);
}

.page-faq .faq-topics__link:hover,
.page-faq .faq-topics__link:focus-visible {
  transform: translateY(-2px);
  border-color: var(--sf-lime);
  box-shadow: var(--sf-shadow-hard);
}

.page-faq .faq-topics__no {
  grid-area: no;
  align-self: start;
  font-family: var(--sf-font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--sf-orange);
  line-height: 1.2;
}

.page-faq .faq-topics__name {
  grid-area: name;
  font-size: 15px;
  font-weight: 700;
  color: var(--sf-fog);
  line-height: 1.45;
}

.page-faq .faq-topics__desc {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(242, 247, 243, 0.62);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-grid3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 720px) {
  .page-faq .faq-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-devices {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .page-faq .faq-devices__item {
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto auto;
    row-gap: 10px;
  }

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

  .page-faq .faq-rhythm__item {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 6px;
  }

  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 22px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-shell {
    grid-template-columns: 234px minmax(0, 1fr);
    gap: clamp(26px, 3.4vw, 48px);
    align-items: start;
  }

  .page-faq .faq-side {
    position: sticky;
    top: clamp(76px, 10vh, 104px);
  }

  .page-faq .faq-topics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-media--wide {
    margin-top: 0;
  }

  .page-faq .faq-topicnav__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
  }
}

@media (max-width: 559px) {
  .page-faq .faq-searchbar {
    border-radius: var(--sf-radius-lg);
  }

  .page-faq .faq-item__panel {
    padding-left: 16px;
    padding-top: 12px;
  }

  .page-faq .faq-contact__line {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-topics__link,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-item__icon::before,
  .page-faq .faq-side__link,
  .page-faq .faq-searchbar .sf-filters__btn {
    transition: none;
  }

  .page-faq .faq-topics__link:hover,
  .page-faq .faq-topics__link:focus-visible {
    transform: none;
  }
}
<<<END>>>