.page-faq {
  --faq-index-w: 236px;
  --faq-gap: clamp(28px, 4vw, 52px);
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-faq .faq-shell {
  width: min(100% - 32px, 1180px);
  margin-inline: auto;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  padding-top: 20px;
  font-size: 13px;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .breadcrumb__link {
  color: var(--blue);
  text-decoration: none;
}

.page-faq .breadcrumb__link:hover {
  text-decoration: underline;
}

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

.page-faq .breadcrumb__current {
  color: var(--muted);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(24px, 4vw, 44px) 0 clamp(26px, 4vw, 40px);
  border-bottom: 1px solid var(--rule);
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 92px;
  height: 3px;
  background: var(--red);
}

.page-faq .faq-hero__tag {
  display: inline-block;
  margin: 0;
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  max-width: 22em;
  font-size: clamp(30px, 6vw, 54px);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ink-900);
}

.page-faq .faq-hero__lede {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-hero__meta li {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 5px 12px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--card);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.page-faq .faq-hero__meta-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--red);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-index {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--card);
  padding: 16px 14px 14px;
  box-shadow: var(--shadow-paper);
}

.page-faq .faq-index__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

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

.page-faq .faq-index__link {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 8px;
  align-items: baseline;
  padding: 9px 10px 9px 8px;
  border-left: 3px solid transparent;
  border-radius: 2px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.5;
  transition: background-color 160ms ease, border-color 160ms ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: rgba(242, 183, 5, 0.12);
  border-left-color: rgba(242, 183, 5, 0.6);
}

.page-faq .faq-index__link[aria-current="true"] {
  background: rgba(242, 183, 5, 0.16);
  border-left-color: var(--gold);
  color: var(--ink-900);
  font-weight: 700;
}

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--red);
}

.page-faq .faq-index__link[aria-current="true"] .faq-index__num {
  color: var(--red-deep);
}

/* ---------- 章节 ---------- */
.page-faq .faq-chapter {
  padding-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--rule);
  margin-top: clamp(28px, 4vw, 44px);
  scroll-margin-top: calc(var(--bar-h) + 20px);
}

.page-faq .faq-chapter:first-child {
  padding-top: 0;
  margin-top: 0;
  border-top: 0;
}

.page-faq .faq-chapter__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-chapter__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--red);
}

.page-faq .faq-chapter__title {
  margin: 0;
  font-size: clamp(21px, 3.4vw, 32px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-faq .faq-chapter__intro {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-chapter a {
  color: var(--blue);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-faq .faq-chapter a:hover {
  color: var(--blue-light);
}

/* ---------- 三步 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: none;
}

.page-faq .faq-step {
  position: relative;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 20px 18px 18px;
  box-shadow: var(--shadow-paper);
}

.page-faq .faq-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--ink-900);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
}

.page-faq .faq-step__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink-900);
  letter-spacing: -0.005em;
}

.page-faq .faq-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--text);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: 0;
}

.page-faq .figure__frame {
  padding: 10px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-paper);
}

.page-faq .figure__frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: 2px;
  background: var(--ink-800);
}

.page-faq .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.66;
  color: var(--muted);
}

/* ---------- 检索方式 ---------- */
.page-faq .faq-methods {
  display: grid;
  gap: 14px;
  margin-bottom: clamp(20px, 3vw, 28px);
}

.page-faq .faq-method {
  padding: 18px 18px 16px;
  border: 1px solid var(--rule);
  border-left: 4px solid var(--red);
  border-radius: var(--radius);
  background: var(--card);
}

.page-faq .faq-method__tag {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--red);
}

.page-faq .faq-method__title {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 800;
  color: var(--ink-900);
}

.page-faq .faq-method__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--text);
}

/* ---------- 深色上限面板 ---------- */
.page-faq .faq-limit {
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--ink-800);
  border-radius: var(--radius);
  background: var(--ink-900);
  background-image: linear-gradient(135deg, rgba(201, 207, 214, 0.06) 0 1px, transparent 1px 100%);
  background-size: 14px 14px;
  color: var(--silver);
}

.page-faq .faq-limit .panel__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-limit__list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-limit__item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(201, 207, 214, 0.18);
}

.page-faq .faq-limit__item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-limit__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 40px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
  min-width: 2.4em;
}

.page-faq .faq-limit__text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--silver);
}

.page-faq .faq-limit__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: rgba(201, 207, 214, 0.88);
}

/* ---------- 字段对照表 ---------- */
.page-faq .faq-fields {
  margin: 0;
  border-top: 1px solid var(--rule);
}

.page-faq .faq-field {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--rule);
}

.page-faq .faq-field__term {
  font-family: var(--font-mono);
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-900);
}

.page-faq .faq-field__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 连号示例 ---------- */
.page-faq .faq-demo {
  padding: 20px 18px 18px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-paper);
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-demo__label {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-demo__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-bottom: 14px;
}

.page-faq .faq-demo__row .ball {
  position: relative;
}

.page-faq .faq-demo__adj::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -9px;
  width: 118%;
  height: 2px;
  transform: translateX(-50%);
  background: var(--gold);
}

.page-faq .faq-demo__sep {
  margin-left: 14px;
  padding-left: 14px;
  border-left: 1px dashed var(--rule);
  border-left-width: 1px;
}

.page-faq .faq-demo__sep::before {
  content: "";
  position: absolute;
  left: -15px;
  top: 50%;
  width: 1px;
  height: 26px;
  transform: translateY(-50%);
  background: var(--rule);
}

.page-faq .faq-demo__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--text);
}

.page-faq .faq-reading {
  display: grid;
  gap: 18px;
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-faq .faq-reading__col {
  padding: 18px 18px 16px;
  border: 1px solid var(--rule);
  border-top: 3px solid var(--blue);
  border-radius: var(--radius);
  background: var(--card);
}

.page-faq .faq-reading__col:last-child {
  border-top-color: var(--red);
}

.page-faq .faq-reading__title {
  margin: 0 0 10px;
  font-size: 16.5px;
  font-weight: 800;
  color: var(--ink-900);
}

.page-faq .faq-reading__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 问答 ---------- */
.page-faq .faq-qa {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  padding: 16px 18px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--card);
}

.page-faq .faq-item__q {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 800;
  line-height: 1.55;
  color: var(--ink-900);
  letter-spacing: -0.005em;
}

.page-faq .faq-item__q::before {
  content: "Q";
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--red);
  vertical-align: 1px;
}

.page-faq .faq-item__a {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}

/* ---------- 联系 ---------- */
.page-faq .faq-help {
  display: grid;
  gap: 18px;
}

.page-faq .faq-help__main {
  display: grid;
  gap: 14px;
}

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

.page-faq .faq-help__side {
  padding: 18px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--ink-900);
  color: var(--silver);
}

.page-faq .faq-help__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .faq-help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-help__list li {
  display: grid;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(201, 207, 214, 0.18);
}

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

.page-faq .faq-help__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(201, 207, 214, 0.72);
}

.page-faq .faq-help__val {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--card);
  word-break: break-word;
}

.page-faq .faq-help__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(201, 207, 214, 0.18);
  font-size: 13px;
  line-height: 1.7;
  color: rgba(201, 207, 214, 0.82);
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-shell {
    width: min(100% - 48px, 1180px);
  }

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

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

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

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

  .page-faq .faq-field {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 0 24px;
    align-items: baseline;
  }

  .page-faq .faq-limit__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-faq .faq-limit__item {
    flex-direction: column;
    gap: 8px;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-faq .faq-help__side {
    padding: 22px;
  }

  .page-faq .faq-help__list li {
    grid-template-columns: 76px minmax(0, 1fr);
    align-items: baseline;
  }
}

/* ---------- 桌面：左目录常驻 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
    align-self: start;
    max-height: calc(100vh - var(--bar-h) - 48px);
    overflow-y: auto;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: var(--faq-gap);
  }

  .page-faq .faq-help {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-faq .faq-field {
    grid-template-columns: 170px minmax(0, 1fr);
  }
}

/* ---------- 大屏 ---------- */
@media (min-width: 1180px) {
  .page-faq {
    --faq-index-w: 260px;
  }

  .page-faq .faq-field {
    grid-template-columns: 190px minmax(0, 1fr);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>