.page-faq {
  --faq-gap: clamp(18px, 2.6vw, 34px);
  --faq-axis: var(--stone);
  --faq-panel: var(--sand-light);
  display: block;
}

/* ——— 首屏 ——— */
.page-faq .faq-hero {
  display: grid;
  gap: var(--gap);
  padding: clamp(26px, 4.4vw, 54px) 0 clamp(22px, 3.4vw, 42px);
  border-bottom: var(--hair);
}

.page-faq .faq-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 4.6vw, 50px);
  line-height: 1.24;
  letter-spacing: .05em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-faq .faq-hero__lede {
  margin: clamp(14px, 1.8vw, 20px) 0 0;
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: var(--ink);
  max-width: 62ch;
}

.page-faq .faq-hero__plates {
  display: grid;
  gap: 0;
  border-top: var(--hair);
}

.page-faq .faq-hero__plates .yy-plate {
  padding: 12px 14px 12px 0;
  border-bottom: var(--hair);
}

.page-faq .faq-hero__plates .yy-plate__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.page-faq .faq-hero__plates .yy-plate__value {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink);
}

/* ——— 分屏骨架 ——— */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "toc"
    "main";
  gap: clamp(22px, 3vw, 40px);
  padding-top: clamp(24px, 3.6vw, 50px);
}

.page-faq .faq-main {
  grid-area: main;
  min-width: 0;
}

/* ——— 步骤目录 ——— */
.page-faq .faq-toc {
  grid-area: toc;
  min-width: 0;
}

.page-faq .faq-toc__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0;
  overflow-x: auto;
  border-top: var(--hair);
  border-bottom: var(--hair);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-toc__link {
  display: block;
  white-space: nowrap;
  padding: 11px 14px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .faq-toc__link:hover {
  color: var(--ink);
}

.page-faq .faq-toc__link[aria-current="true"] {
  color: var(--ink);
  border-bottom-color: var(--danxia);
}

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

.page-faq .faq-section + .faq-section {
  margin-top: clamp(38px, 5vw, 76px);
}

.page-faq .faq-section__head {
  padding-bottom: clamp(16px, 2vw, 24px);
}

.page-faq .faq-section__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(21px, 2.7vw, 33px);
  line-height: 1.35;
  letter-spacing: .07em;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-faq .faq-section__note {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 68ch;
}

.page-faq .faq-section__foot {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-section__foot a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
}

.page-faq .faq-section__foot a:hover {
  border-bottom-color: var(--danxia);
}

.page-faq .faq-section a:focus-visible,
.page-faq .faq-toc__link:focus-visible,
.page-faq .faq-qa__trigger:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

/* ——— 四步自查 ——— */
.page-faq .faq-steps {
  display: grid;
  gap: 0;
  border-top: var(--hair);
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 24px 0 26px 20px;
  border-left: 2px solid var(--stone);
  border-bottom: var(--hair);
  transition: border-left-color .25s var(--ease);
}

.page-faq .faq-step[data-state="checked"] {
  border-left-color: var(--stone);
}

.page-faq .faq-step[data-state="pending"] {
  border-left-color: var(--sand);
}

.page-faq .faq-step[data-state="submit"] {
  border-left-color: var(--danxia);
}

.page-faq .faq-step__num {
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(36px, 5.4vw, 62px);
  line-height: .9;
  letter-spacing: -0.02em;
  color: var(--stone);
}

@supports (-webkit-text-stroke: 1px #000) {
  .page-faq .faq-step__num {
    color: transparent;
    -webkit-text-stroke: 1px var(--ink);
  }
}

.page-faq .faq-step__state {
  display: inline-block;
  margin: 0;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
  border: 1px solid currentColor;
  border-radius: var(--radius);
}

.page-faq .faq-step[data-state="pending"] .faq-step__state {
  color: var(--danxia-deep);
}

.page-faq .faq-step[data-state="submit"] .faq-step__state {
  color: var(--danxia);
}

.page-faq .faq-step__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.5;
  letter-spacing: .05em;
  color: var(--ink);
}

.page-faq .faq-step__lead {
  margin: 10px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink);
  max-width: 64ch;
}

.page-faq .faq-step__list {
  margin: 12px 0 0;
  padding-left: 1.1em;
  max-width: 64ch;
}

.page-faq .faq-step__list li {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  margin-bottom: 6px;
}

.page-faq .faq-step__list a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
}

.page-faq .faq-step__list a:hover {
  border-bottom-color: var(--danxia);
}

.page-faq .faq-step__linkline {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-step__linkline a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
}

/* ——— 设置异常判别 ——— */
.page-faq .faq-cross {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: var(--hair);
  background: var(--paper);
  box-shadow: var(--shadow-1);
}

.page-faq .faq-cross__cell {
  padding: 22px 22px 24px;
}

.page-faq .faq-cross__cell + .faq-cross__cell {
  border-top: var(--hair);
}

.page-faq .faq-cross__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .16em;
  color: var(--danxia);
}

.page-faq .faq-cross__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-cross__text a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
}

.page-faq .faq-cross__verdict {
  margin-top: -1px;
  padding: 22px clamp(18px, 2.6vw, 28px) 24px;
  background: var(--sand-light);
  border: var(--hair);
}

.page-faq .faq-cross__verdict-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--danxia-deep);
}

.page-faq .faq-cross__verdict-list {
  margin: 12px 0 0;
  padding-left: 1.1em;
}

.page-faq .faq-cross__verdict-list li {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  margin-bottom: 8px;
}

.page-faq .faq-cross__verdict-list strong {
  font-weight: 700;
  color: var(--danxia-deep);
}

/* ——— 版本第 3 步 ——— */
.page-faq .faq-diagram {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

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

.page-faq .faq-figure__media {
  overflow: hidden;
  border: var(--hair);
  background: var(--stone);
  box-shadow: var(--shadow-1);
  aspect-ratio: 3 / 2;
}

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

.page-faq .faq-figure--side .faq-figure__media--compact {
  aspect-ratio: 10 / 7;
}

.page-faq .faq-path {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--hair);
}

.page-faq .faq-path__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0 20px;
  border-bottom: var(--hair);
}

.page-faq .faq-path__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 200;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--danxia);
}

.page-faq .faq-path__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 16px;
  letter-spacing: .05em;
  color: var(--ink);
}

.page-faq .faq-path__text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink);
}

/* ——— 提交要点 ——— */
.page-faq .faq-submit {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  align-items: start;
}

.page-faq .faq-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--hair);
}

.page-faq .faq-check {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 16px 0;
  border-bottom: var(--hair);
}

.page-faq .faq-check__box {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  border: 1px solid var(--muted);
  border-radius: 1px;
  background: var(--paper);
  cursor: pointer;
  flex: none;
}

.page-faq .faq-check__box:checked {
  border-color: var(--danxia);
  background: var(--danxia);
}

.page-faq .faq-check__box:checked::after {
  content: "";
  display: block;
  width: 4px;
  height: 8px;
  margin: 1px auto 0;
  border-right: 2px solid var(--paper);
  border-bottom: 2px solid var(--paper);
  transform: rotate(45deg);
}

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

.page-faq .faq-check__text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  cursor: pointer;
}

.page-faq .faq-check__text strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 15px;
  letter-spacing: .04em;
  color: var(--ink);
}

.page-faq .faq-check__box:checked ~ .faq-check__text {
  color: var(--muted);
}

/* ——— 响应时效（深色面板） ——— */
.page-faq .faq-dark {
  padding: clamp(26px, 4vw, 50px) clamp(20px, 3vw, 44px);
  background: var(--ink-deep);
  color: var(--paper);
  border-top: 2px solid var(--danxia);
}

.page-faq .faq-section__head--dark .yy-eyebrow {
  color: var(--sand);
}

.page-faq .faq-section__head--dark .faq-section__title {
  color: var(--paper);
}

.page-faq .faq-flow {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-faq .faq-flow__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 18px 0 20px;
  border-top: var(--hair-dark);
}

.page-faq .faq-flow__code {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--paper-a60);
}

.page-faq .faq-flow__item[data-node="current"] .faq-flow__code {
  color: var(--sand);
}

.page-faq .faq-flow__item[data-node="current"] {
  border-top-color: var(--sand);
}

.page-faq .faq-flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: .05em;
  color: var(--paper);
}

.page-faq .faq-flow__text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--paper-a80);
  max-width: 66ch;
}

/* ——— 高频问题 ——— */
.page-faq .faq-qa {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-faq .faq-qa__col {
  border-top: var(--hair);
}

.page-faq .faq-qa__item {
  border-bottom: var(--hair);
}

.page-faq .faq-qa__heading {
  margin: 0;
  font-size: inherit;
  font-weight: 400;
}

.page-faq .faq-qa__trigger {
  position: relative;
  display: block;
  width: 100%;
  padding: 16px 34px 16px 0;
  background: transparent;
  border: 0;
  text-align: left;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  cursor: pointer;
}

.page-faq .faq-qa__trigger::after {
  content: "+";
  position: absolute;
  top: 15px;
  right: 6px;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--danxia);
}

.page-faq .faq-qa__trigger[aria-expanded="true"]::after {
  content: "−";
}

.page-faq .faq-qa__panel {
  padding: 0 34px 18px 0;
}

.page-faq .faq-qa__panel p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-qa__panel a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--sand);
}

.page-faq .faq-feedback {
  margin-top: clamp(38px, 5vw, 72px);
}

/* ——— 窄屏细节 ——— */
@media (max-width: 420px) {
  .page-faq .faq-step {
    padding-left: 16px;
  }

  .page-faq .faq-step__num {
    font-size: 34px;
  }

  .page-faq .faq-hero__plates .yy-plate {
    padding-right: 8px;
  }
}

/* ——— 平板 ——— */
@media (min-width: 700px) {
  .page-faq .faq-cross {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-cross__cell + .faq-cross__cell {
    border-top: 0;
    border-left: var(--hair);
  }

  .page-faq .faq-diagram {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: clamp(26px, 3.4vw, 48px);
  }

  .page-faq .faq-submit {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: clamp(26px, 3.4vw, 48px);
  }

  .page-faq .faq-qa {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .faq-flow__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }
}

/* ——— 桌面：步骤目录吸顶 ——— */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .82fr);
    align-items: end;
    gap: clamp(28px, 4vw, 60px);
  }

  .page-faq .faq-hero__plates {
    border-top: 0;
    border-left: 1px solid var(--stone);
    padding-left: clamp(16px, 2vw, 26px);
  }

  .page-faq .faq-hero__plates .yy-plate {
    padding-left: 0;
  }

  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) 232px;
    grid-template-areas: "main toc";
    gap: clamp(32px, 4vw, 64px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-faq .faq-toc__list {
    display: block;
    overflow: visible;
    border: 0;
    border-left: 1px solid var(--stone);
  }

  .page-faq .faq-toc__link {
    white-space: normal;
    padding: 7px 10px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    line-height: 1.6;
  }

  .page-faq .faq-toc__link[aria-current="true"] {
    border-left-color: var(--danxia);
    border-bottom-color: transparent;
  }

  .page-faq .faq-step {
    grid-template-columns: 104px minmax(0, 1fr);
    gap: clamp(18px, 2.4vw, 32px);
    padding: 30px 0 32px 28px;
  }

  .page-faq .faq-step__num {
    padding-top: 4px;
  }
}

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